It’s slush and cold outside the window, you can’t walk properly anymore, but you need to somehow entertain the children. Maybe do a couple of "scientific experiments"? And at the same time explain to the child that all substances in the world have different densities: for example, the density of oil is lower than the density of water.
What follows from this? They never mix, and you can take advantage of that.
fireworks in a jar
Everything you need for this experiment is already in your kitchen: a jar, water, vegetable oil and food coloring. And everything looks spectacular and does not require a lot of time and effort.
Fill the jar with warm water about two-thirds. Pour 3-4 tablespoons of vegetable oil into a small bowl and drop food coloring of different colors into it (if you have the dye in powder, make an aqueous solution). 
Mix the oil and dye with a fork to make smaller multi-colored drops - water will not mix with oil, so there is nothing to be afraid of. 
Carefully pour the oil and paint into the water and watch what happens. 
The food coloring will slowly dissolve into the water, forming colored streaks, and then mix to create new colors.
The essence of what is happening is that the oil will always float on the surface, but the paint will sink, it is heavier than the oil. It all looks like little colored explosions - hence the name: fireworks in a jar.
lava lamp
This experiment uses: a tall bottle, for example, from water, or a container for bulk substances, vegetable oil, water, food coloring and effervescent tablets: alka-seltzer, soluble aspirin, in general, those that release carbon dioxide on contact with water. The result is something like a paraffin lamp, which was popular twenty years ago, only without paraffin and heating, but with the same meditative effect.
You need a lot of oil: fill the bottle with it a little more than half. Top up the rest with water and wait until all the code is at the bottom. Now add ten drops of food
For what I had the worst grades in chemistry, but it was still interesting to "chemize" in the lessons (even if there were 3 according to the results). Is it possible that memorizing formulas in advance without reference to experiments can contribute to interest in the subject?
My children and I were fortunate to receive and test MEL Chemistry kits from MEL Science. Perhaps this is the most modern and convenient opportunity to introduce children to chemistry, without waiting until they start studying it 1 hour a week in the 8th grade. The program has three components. These are kits for conducting safe chemical experiments at home; project website, which provides subscription and scientific support; and...
The quality of the lessons has changed, my little kick was enough. And, most importantly, I saw how he behaves and what my child feels in the classroom. I even managed to explain to the child a topic in chemistry that the teacher could not explain in class.
Life experience and from the sources gleaned. Children at school - on the basis of the same. And I do not think that such conversations with parents would give the child less. But school! And electives are better. Lessons some children sit out, nobody needs it.
I dropped my mobile phone on all the children in the RD, apparently experience does not teach anything) nothing, everyone is alive and well) , Such a joke. reading courses for children. weeping sore. chemistry lessons online.
In my experience:). Although here (in general in the country) the year is not like a year, yes. When my daughter was in the 5th grade, she even had fewer lessons than in some schools. For children in biochemistry classes, extra chemistry and biology is a welcome vacation from annoying mathematicians and ...
The child is less stressed, and better than he knows, he still won’t write. Chemist. "Whoever doesn't want to go to my lessons - don't go, there will be no sanctions. I don't need empty eyes at the lesson" - this is how she greeted the seventh graders at the first chemistry lesson.
White robe for Chemistry lessons can be bought on the website [link-1]. Both small and large sizes 09/18/2016 21:10:15, Katari-na. Shops "special clothing", the northernmost i>.
In fact, there are no such experiments that could unambiguously prove that this food or food supplement = poison. Here is another bread nearby, it has much less of this chemistry, we'd better buy it.
All the more small. The child rushes to homework on his own, trying his best. Parties are free! When I myself studied at school, we had a chemist who, as a knowledge of chemistry, demanded that the flask be drawn to a certain amount ...
MUNICIPAL AUTONOMOUS
GENERAL EDUCATIONAL INSTITUTION
"SEVERAGE SCHOOL № 8
« Chemistry for the little ones
X"FOR A STUDENT OF THE 2nd CLASS
Mukhamatullina L.Yu
- chemistry teacher
Labytnangi
PROGRAM OF EXTRA COURSE ACTIVITIES
"Chemistry for the little ones"
Orientation: natural - scientific
Age of students: 7 - 11 years old
Level of development: general cultural
Course length: 35h
Development period: 1 year
Mukhamatullina L.Yu. - Chemistry teacher of the first qualification category
I. Explanatory note………………………………………………………....3
II. Curriculum and thematic plan…………………………………………………………7
III. Program Content……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………
IV .Methodological support of the program……………………………………..12
V. References……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….23
Explanatory note
The program of extracurricular activities is intended for a 2nd grade student. The program is author's, designed for 35 hours. The program of extracurricular activities has natural - scientific orientation. The content of the program introduces the student to the properties and uses of substances and materials found in our homes, therefore level of mastering the additional educational program can be defined as general cultural. Mastering the content of education of an additional educational program is carried out on heuristic level.
Children of this age are very inquisitive and instilling interest in the subject in this period seems very attractive. The program is designed taking into account the age characteristics and capabilities of the child; at the same time it contains great developmental potential. In the classroom, the child gets acquainted with laboratory equipment, acquires the skills to work with chemical glassware and learns to conduct simple chemical experiments in compliance with safety regulations. Substances familiar to children are used as chemical reagents: table salt, baking soda, vinegar, citric acid, activated carbon, etc.
When implementing this educational program, a large number of practical works are provided using modern specialized laboratory equipment. Data collection, processing, methods of some laboratory work, presentations are carried out using equipment manufactured by PASCO.
Goals of the additional educational program : development of observation, creativity and individual abilities of students.
Having studied this course of the additional educational program, the student must know the composition and properties of substances and objects that surround him in everyday life,
be able to:
conduct a chemical experiment;
observe safety rules when handling medicines, hygiene products, household chemicals, when working in the laboratory;
prepare solutions, conduct simple analysis.
Forms of control of assimilation of material are reports on practical work, creative work, speeches at seminars, presentations on the topic in MS Power Point, etc. Preparation of a slide presentation involves mastering the skills and abilities of working with this program. The student completes tasks at an individual pace, cooperating with the teacher. Work on projects creates a situation that makes it possible to realize creative forces, to ensure the development of personal knowledge, one's own opinion, one's own style of activity. The student is included in real creative activity, which attracts with novelty and unusualness; this becomes the strongest incentive cognitive interest. At the same time, the ability to identify problems and resolve emerging contradictions develops.
It is planned to present works in educational activities in the study of relevant topics, to use materials in extracurricular activities.
Program implementation period : 1 year.
Work form individual (performing individual tasks, laboratory experiments).
Educational - thematic plan
Topic name
Theoretical lessons
Workshops
Observation and experiment as methods of studying natural science and chemistry
Modeling
Chemistry and geography
Chemistry and physics
Qualitative reactions in chemistry
Chemistry and biology
Chemistry at home
Observation and experiment as methods of studying natural science and chemistry (7h). Chemistry is the science of substances. Acquaintance with laboratory equipment, chemical glassware. Methods for handling laboratory equipment. Rules of conduct in the laboratory. Water, its properties. Ways of cleaning in everyday life and its disinfection in a camping trip. Pure substances and mixtures. Separation of mixtures. Paper chromatography
Practical work The simplest operations with matter. Performing operations of pouring, pouring, weighing, water purification: filtering, evaporation, settling.
Watching a burning candle. The device and operation of the alcohol stove. . Determination of the suitability of water for drinking (water clarity, odor intensity). Water purification: settling, filtering, evaporation. Separation of mixtures. Separation of mixtures by paper chromatography.
Topic 2. Modeling (h)
Model, modeling. Features of modeling in geography, physics, biology. Chemical models: subject, iconic or symbolic.
Chemical signs and formulas. Practical work. Collecting models of molecules of water, carbon dioxide and carbon monoxide, methane, ammonia, sodium chloride.
Topic 3. Chemistry and geography (2h)
Earth's crust. Minerals. Rocks. Inorganic and organic sedimentary rocks.
Laboratory experience. Acquaintance with collections of minerals and rocks.
Practical work. Acquaintance with semi-precious and ornamental stones, creation of presentations.
Topic 4. Chemistry and physics (3 hours)
Aggregate states of substances. Three states of aggregation on the example of water. liquid substances. physical phenomena. magnetic fields. The study of atmospheric pressure.
Boiling water. gaseous substances. Atmosphere pressure. Properties of gases.
magnetic fields.
Laboratory experiments Observation of the Brownian motion of carcass particles in water. The study of magnetic fields generated by magnets of various shapes.
Topic 5. Qualitative reactions in chemistry (8 hours)
Physical phenomena and chemical reactions. quality reactions. Indicators. Discovery history
Practical work Obtaining and recognition of oxygen. Obtaining and recognition of carbon dioxide. Recognition of lime water. Obtaining indicators from red cabbage, beets, furacilin, cherries, black currants, violet petals, turmeric. Testing with indicators of various media: lemonade, mineral water, detergent solutions, soaps, dishwashing detergents.
Topic 6. Chemistry and biology (6h)
Proteins, carbohydrates, fats: importance for the body. Vitamins: A, B, C, D, their value.
Practical work Detection of starch in flour, cereals, potatoes. The conversion of starch in bread into glucose when chewed. Detection of fat in sunflower seeds, flax, nuts in comparison with chips. The study of the content of vitamins in food (study of packages). Vitamin C detection
Topic 7. Chemistry in everyday life (6 hours)
Adsorption. Extraction. Air cleaning.
Practical work. Comparison of absorbent properties of blotting paper, activated carbon, corn sticks. Removing an ink stain with chalk and cologne. Cleaning the air with baking soda.
Requirements for knowledge and skills of students
Know
finding water in nature, properties of water, methods of water purification ;
the presence of water in products, the concepts of "chromatography", "indicator";
composition and properties of organic substances that make up food products; basics of food hygiene; the action of enzymes;
the value of minerals, vitamins contained in food;
safety precautions for the storage and use of household chemicals.
Be able to
justify the role of water, treat it with care, apply the simplest methods of drinking water purification, prepare solutions, separate mixtures using chromatography, test various solutions with indicators, make indicators from plants;
detect carbohydrates, fats, organic acids in food; grow salt crystals, hold soft drinks;
detect minerals, vitamins in food, explain their role;
use household chemicals, observing safety rules,
remove stains of various origins at home.
Literature:
Van Cleve J. "200 experiments" / Per. from English. - M., "John Wylie and Suns", 1995
Tebieva E.A. Chemistry for kids / Chemistry at school No. 5, 2008
Makeev A.F., Osogostok D.N., Tyumentseva T.S. / Valeology in teaching chemistry in schools of the North. - Yakutsk, 1999
Ivchenko L.A., Makarenya A.A. Valeology at the lessons of inorganic chemistry. - Tyumen, TOGIRRO, 1998
Olgin O.M. miracles to choose from, or chemical experiments for beginners. – M.: Det. lit., 1987
Science experiments at home. Encyclopedia for children / Per. with him. P. Lemeni - Macedonia. – M.: Eksmo, 2011
Health at home in questions and answers No. 11, 2012
PART ONE - NECESSARY AND THEORETICAL
Chemical reaction is a process in which substances undergo a chemical change in order to form brand new stuff.
Where do chemical reactions take place?
You might think that chemical reactions occur only in scientific laboratories, but in fact they take place all the time in the world around us. Every time we eat, our body uses chemical reactions to turn food into energy. Metal rusts, wood burns, batteries produce energy, photosynthesis in plants is all chemical reactions.
What is a reagent, reactant and final product?
Reactants and reagents are substances that take part in a chemical reaction. reactant is any substance that is used in a reaction. The substance that results from a chemical reaction is called final product.
Speed reaction
Not all chemical reactions proceed at the same rate. Some happen very quickly, like explosions, while others can take a long time, like the process of rusting metal. The rate at which the reactants are converted into the final product is called reaction rate. The rate of a reaction can be greatly increased by adding energy such as heat, sunlight, or electricity. Increasing the concentration or pressure of the reactants also increases the rate of the reaction.
Reaction types
There are many types of chemical reactions. Here are some examples:
- Synthesis reaction. A fusion reaction is the process of combining two substances to form a new substance. This can be shown by the example A + B → A-B.
- Decay reaction. A decomposition reaction is a reaction in which a complex substance breaks down into two separate substances. This can be shown by the example A-B → A + B.
- Combustion. A combustion reaction occurs when oxygen combines with another component, resulting in water and carbon dioxide. The combustion reaction produces energy in the form of heat.
- Single substitution reaction. This is a reaction in which one reactant takes an element from another reactant. It looks like this: A + BC → AC + B.
- Double substitution reaction. Also called reaction metathesis. Imagine two reactants exchanging elements. It looks like this: AB + CD → AD + CB.
- photochemical reaction. In this reaction, photons are absorbed from light. One example of such a reaction is photosynthesis.
Catalysts and inhibitors
Sometimes a third substance is involved in a chemical reaction in order to speed up or slow down the reaction. Catalysts help speed up the reaction inhibitors on the contrary, it is reduced.
Interesting facts about chemical reactions:
- When ice melts physical transformation of a solid into a liquid occurs. However, this is not a chemical reaction, as it is still the same substance (H2O is water).
- Mixtures and solutions are not chemical reactions, since the molecular composition of the substance remains unchanged.
- Majority cars receive energy from the motor in which the combustion reaction occurs.
- rockets set in motion by the fusion reaction of liquid hydrogen and liquid oxygen.
- When one reaction causes other reactions to form, this is sometimes called chain reaction.
PART TWO - FUN AND VISUAL
And now we offer you experiments, thanks to which the child will see for himself that a chemical reaction is great!
SODA VOLCANO
A simple experiment, for the organization of which you need the most common objects and substances that are available in almost every home.
You will need:
- Baking soda;
- Vinegar;
- Large enough container to avoid leaks;
- Paper or cloth towels (just in case)
Instruction:
- Put the baking soda in a container.
- Pour in some vinegar.
- Watch for the reaction!
What's happening?
A solution of baking soda (sodium bicarbonate) is an alkaline medium, and vinegar is an acid. When these two substances react, a carbonic acid, which is very unstable and instantly decomposes into water and carbon dioxide. It is he, evaporating, and creates hiss.
Additionally, you can make a volcano that looks like a real one. This will require some creativity and skill on your part, but it will make the vinegar and baking soda experience even more impressive!
FOUNTAIN FROM DIET COLAS AND MENTOS DRAGEES
A very famous experiment that is interesting to do the first time, and the second, and the third ...
Made popular by Steve Spangler, a cola and Mentos geyser is sure to amuse and surprise your kids, friends, and family (if you spend it outside, of course). and not in the living room).
You will need:
- Large bottle of Diet Coke;
- Approximately half a pack of Mentos;
- Geyser Tube toy (optional, but it's much easier to experiment with this device).
Instruction:
- Find a place to experiment where nothing gets hurt when everything is covered in Diet Coke. An ideal place would be a playground on the grass, a yard. Please don't even try to make a geyser in the living room!
- Stand the Coke bottle upright and unscrew the cap. Position the funnel or tube on top so that you can pour in the right amount of Mentos at the same time (about half a package is just right). This is quite difficult to do if you do not have a specially designed Geyser Tube toy (you can buy it on the Internet or search in stores), but it is quite possible.
- Now for the fun part: Throw a Mentos into a Diet Coke and run as fast as you can! If you did everything right, a huge geyser should fly out of the bottle - this is a very impressive sight. The height record for such a fountain was about 9 meters!
What's happening?
There are several theories as to why this reaction occurs, but the most plausible is a combination of carbon dioxide in Diet Coke and the small pits found on Mentos.
The fact is that carbonated drinks foam due to carbon dioxide, which is added to the drink bottles during manufacture. Carbon dioxide is not released from the liquid until you pour it into a glass and drink it. A certain amount of gas also comes out when you open the cap (by the way, quite a lot if you shake the bottle beforehand). So a lot of the carbon dioxide in the soda bottle is just waiting to be bubbled out of the liquid.
When you toss something into a Diet Coke, you are speeding up the process, as your action reduces the surface tension of the liquid and also allows bubbles to form on the surface of the Mentos. Mentos candies are covered with small pits (resembles a golf ball), which significantly increase their surface area and allow a huge number of bubbles to form.
The experiment is best done with Diet Coke, and not with other carbonated drinks - it has a special, suitable composition, and besides, it is not so sticky. Also, the experience works better with cola, which was made not so long ago. A bottle that has been sitting on the store shelf for a long time is losing some of its "bubbly", so check the date of manufacture before buying.
We hope that both you and your children were interested - there is still a lot of exciting things ahead!
Such a complex but interesting science as chemistry always causes an ambiguous reaction among schoolchildren. The children are interested in experiments, as a result of which substances of bright colors are obtained, gases are released or precipitation occurs. But only a few of them like to write complex equations of chemical processes.
The Importance of Entertaining Experiences
According to modern federal standards in general education schools, such a subject of the program as chemistry was also not left without attention.
As part of the study of complex transformations of substances and solving practical problems, the young chemist hones his skills in practice. It is in the course of unusual experiments that the teacher forms an interest in the subject in his pupils. But in ordinary lessons, it is difficult for a teacher to find enough free time for non-standard experiments, and there is simply no time to conduct them for children.
To remedy this, additional elective and elective courses were invented. By the way, many children who are fond of chemistry in grades 8-9 become doctors, pharmacists, scientists in the future, because in such classes a young chemist gets the opportunity to independently conduct experiments and draw conclusions from them.
What courses are associated with entertaining chemistry experiments?
In the old days, chemistry for children was available only from the 8th grade. No special courses or extracurricular activities in the field of chemistry were offered to children. In fact, there was simply no work with gifted children in chemistry, which had a negative impact on the attitude of schoolchildren to this discipline. The guys were afraid and did not understand complex chemical reactions, they made mistakes in writing ionic equations.
In connection with the reform of the modern education system, the situation has changed. Now in educational institutions are offered in the lower grades. The children are happy to do the tasks that the teacher offers them, learn to draw conclusions.
Optional courses related to chemistry help high school students gain skills in working with laboratory equipment, and those designed for younger students contain vivid, demonstrative chemical experiments. For example, children study the properties of milk, get acquainted with those substances that are obtained when it is sour.
Experiments with water
Entertaining chemistry for children is interesting when, during the experiment, they see an unusual result: gas evolution, bright color, unusual sediment. A substance such as water is considered ideal for conducting a variety of entertaining chemical experiments for schoolchildren.
For example, chemistry for children of 7 years old may begin with an acquaintance with its properties. The teacher tells the children that most of our planet is covered with water. The teacher also informs the pupils that in a watermelon it is more than 90 percent, and in a person - about 65-70%. Having told schoolchildren about how important water is for humans, we can offer them some interesting experiments. At the same time, it is worth emphasizing the “magic” of water in order to intrigue schoolchildren.
By the way, in this case, the standard set of chemistry for children does not involve any expensive equipment - it is quite possible to limit yourself to available devices and materials.
Experience "Ice Needle"
Let's give an example of such a simple and also interesting experiment with water. This is a building of ice sculpture - "needles". For the experiment you will need:
- water;
- salt;
- ice cubes.
The duration of the experiment is 2 hours, so such an experiment cannot be carried out in a regular lesson. First you need to pour water into the ice mold, put in the freezer. After 1-2 hours, after the water turns into ice, entertaining chemistry can continue. For the experience, you will need 40-50 ready-made ice cubes.
First, the children must arrange 18 cubes on the table in the form of a square, leaving an empty space in the center. Then, after sprinkling them with table salt, they are carefully applied to each other, thus gluing together.
Gradually, all the cubes are connected, and as a result, a thick and long “needle” of ice is obtained. To make it, 2 teaspoons of table salt and 50 small pieces of ice are enough.
It is possible, by tinting the water, to make the ice sculptures multi-colored. And as a result of such a simple experience, chemistry for children of 9 years old becomes an understandable and exciting science. You can experiment by gluing ice cubes in the form of a pyramid or rhombus.
Experiment "Tornado"
This experiment will not require special materials, reagents and tools. The guys will be able to make it in 10-15 minutes. For the experiment, stock up:
- a plastic transparent bottle with a cap;
- water;
- dishwashing detergent;
- sequins.
The bottle must be filled 2/3 with plain water. Then add 1-2 drops of dishwashing detergent to it. After 5-10 seconds, pour a couple of pinches of sparkles into the bottle. Tighten the cap tightly, turn the bottle upside down, holding the neck, and twist clockwise. Then we stop and look at the resulting vortex. Until the moment the "tornado" works, you will have to scroll the bottle 3-4 times.
Why does a "tornado" appear in an ordinary bottle?
When a child makes circular movements, a whirlwind similar to a tornado appears. The rotation of water around the center occurs due to the action of centrifugal force. The teacher tells the children about how terrible tornadoes are in nature.
Such an experience is absolutely safe, but after it, chemistry for children becomes a truly fabulous science. To make the experiment more vivid, you can use a coloring agent, for example, potassium permanganate (potassium permanganate).
Experiment "Soap Bubbles"
Want to teach kids what fun chemistry is? Programs for children do not allow the teacher to pay due attention to experiments in the lessons, there is simply no time for this. So, let's do this optionally.
For elementary school students, this experiment will bring a lot of positive emotions, and you can do it in a few minutes. We will need:
- liquid soap;
- jar;
- water;
- thin wire.
In a jar, mix one part liquid soap with six parts water. We bend the end of a small piece of wire in the form of a ring, lower it into the soap mixture, carefully pull it out and blow out a beautiful soap bubble of our own making from the mold.
Only wire that does not have a nylon layer is suitable for this experiment. Otherwise, children will not be able to blow soap bubbles.
In order to make it more interesting for the guys, you can add food coloring to the soap solution. You can arrange soap competitions between schoolchildren, then chemistry for children will become a real holiday. The teacher thus introduces the children to the concept of solutions, solubility and explains the reasons for the appearance of bubbles.
Entertaining experience "Water from plants"
To begin with, the teacher explains how important water is for cells in living organisms. It is with the help of it that the transport of nutrients occurs. The teacher notes that in case of insufficient amount of water in the body, all living things die.
For the experiment you will need:
- spirit lamp;
- test tubes;
- green leaves;
- test tube holder;
- copper sulfate (2);
- beaker.
This experiment will take 1.5-2 hours, but as a result, chemistry for children will be a manifestation of a miracle, a symbol of magic.
Green leaves are placed in a test tube, fixed in the holder. In the flame of an alcohol lamp, you need to heat the entire test tube 2-3 times, and then this is done only with the part where the green leaves are.
The glass should be placed so that the gaseous substances released in the test tube fall into it. As soon as the heating is completed, to a drop of the liquid obtained inside the glass, add grains of white anhydrous copper sulfate. Gradually, the white color disappears, and copper sulfate becomes blue or blue.
This experience leads children to complete delight, because the color of substances changes before their eyes. At the end of the experiment, the teacher tells the children about such a property as hygroscopicity. It is due to its ability to absorb water vapor (moisture) that white copper sulfate changes its color to blue.
Experiment "Magic Wand"
This experiment is suitable for an introductory lesson in an elective course in chemistry. First, you need to make a star-shaped blank from it and soak it in a solution of phenolphthalein (indicator).
During the experiment itself, the star attached to the "magic wand" is first immersed in an alkali solution (for example, in a solution of sodium hydroxide). Children see how in a matter of seconds her color changes and a bright crimson color appears. Next, the colored form is placed in an acid solution (for the experiment, the use of a hydrochloric acid solution would be optimal), and the crimson color disappears - the asterisk becomes colorless again.
If the experiment is carried out for kids, during the experiment the teacher tells a "chemical fairy tale". For example, the hero of a fairy tale can be an inquisitive mouse who wanted to know why there are so many bright colors in a magical land. For students in grades 8-9, the teacher introduces the concept of "indicator" and notes which indicators can determine the acidic environment, and which substances are needed to determine the alkaline environment of solutions.
The Genie in the Bottle Experience
This experiment is demonstrated by the teacher himself, using a special fume hood. The experience is based on the specific properties of concentrated nitric acid. Unlike many acids, concentrated nitric acid is able to enter into chemical interaction with metals located after hydrogen (with the exception of platinum, gold).
Pour it into a test tube and add a piece of copper wire there. Under the hood, the test tube is heated, and the children observe the appearance of “red gin” vapors.
For students in grades 8-9, the teacher writes the equation of a chemical reaction, highlights the signs of its course (color change, the appearance of gas). This experience is not suitable for demonstration outside the walls of the school chemistry room. According to safety regulations, it involves the use of nitric oxide vapors (“brown gas”) are dangerous for children.
Home experiments
In order to warm up the interest of schoolchildren in chemistry, you can offer a home experiment. For example, to conduct an experiment on growing salt crystals.
The child should prepare a saturated solution of table salt. Then place a thin branch in it, and, as the water evaporates from the solution, salt crystals will “grow” on the branch.
The jar of solution must not be shaken or rotated. And when after 2 weeks the crystals grow, the stick must be very carefully removed from the solution and dried. And then, if desired, you can cover the product with a colorless varnish.
Conclusion
There is no more interesting subject in the school curriculum than chemistry. But in order for children not to be afraid of this complex science, the teacher must devote sufficient time in his work to entertaining experiments and unusual experiments.
It is the practical skills that are formed in the course of such work that will help stimulate interest in the subject. And in the lower grades, entertaining experiments are considered by the Federal State Educational Standards as an independent project and research activity.