What? Why? Why? Entertaining physics, mechanics, astronomy, mathematics

Young readers, you have a wonderful book, written specifically for those guys who seek to become educated, interesting and highly erudite interlocutors. The publication will open you new in the world of natural sciences, and also explain the phenomena that seemed absolutely not clear to you: what is an eternal engine, why blows from a closed window if the ice is not melted in boiling water, there is a sea in which you can not drown I came up with the words "gas" and "atmosphere", how much air we breathe, what a visual deception, how to measure the depth of the pond without any devices and much more.
In addition, a large number of developing tasks and puzzles with a detailed solution and explanations are represented in the book.
This is a perfectly illustrated edition will be an excellent gift for inquisitive readers