What is everything around made of? What are an atom and a molecule? How does a chemical transformation differ from a physical one? What happens if you boil sand? Why are fireworks multi-colored? What do a pencil lead and a diamond have in common? Chevostik really wants to know all this, and Uncle Kuzya, as always, is happy to help him with this! Together they will go on an exciting journey through space and time to meet ancient glassmakers, alchemists and famous chemists of past centuries. And then, under the supervision of Uncle Kuzya, Chevostik will conduct several experiments in the kitchen, which will help to understand how this important science - chemistry - works. “Children's encyclopedias with Chevostik” is a well-known educational audio project, first published in book format. The book series includes the texts of the most interesting audio plays. The book is intended for children of primary school age.