Why do objects fall to the floor and not to the ceiling? Why doesn't the ball sink in water? Where does the echo come from? Why does thunder roar during a thunderstorm and how does a rainbow appear? His smart older friend Uncle Kuzya will help the inquisitive Chevostik answer these and many other questions. To do this, they will go on an exciting journey in which they will get acquainted with an extremely interesting and important science - physics! Together with little readers, they will observe interesting phenomena, and Uncle Kuzya will explain their physical nature. “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 performances.