How does a plane fly in the air, a ship floats on water, and a tram rides on rails? How is natural gas produced, and how is shale gas produced? Why is it summer on one end of the Earth and winter on the other? How are mountains formed and as a result of which avalanches fall? Why is the grass wet in the early summer morning, why does the snowflake have such an interesting shape, and the oceans do not overflow? Little Pochemuchki want to know absolutely everything right now. They will find answers to these and other numerous questions in our book, because we have prepared it specifically for them.