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Why objects fall on the floor and not on the ceiling? Why the ball floats on water? Where does the echo? Why during a thunderstorm and thunder like a rainbow?Answer these and many other questions will help his inquisitive Chevostiku smart older friend Uncle Kuzma. To do this, they will go on an exciting journey that will be introduced with an unusually interesting and important science - physics! Together with young readers, they will observe the interesting phenomena, and Uncle Kuzma explain their physical nature.