Simple Mechanics. Wheels, Levers, and Gears

How to start studying mathematics so that the child understands everything, but at the same time does not get bored? The books in this series will help your child understand the basics of mathematics and physics. The material in the... books is presented briefly and simply — only the most important information on the subject and bright, clear illustrations that will surely appeal to your little mathematician and make the classes interesting.
The author of the books is David Abraham Adler, an outstanding popularizer of science who has written more than 250 books for children and teenagers. His works have helped many children understand and love the exact sciences, the study of which usually poses difficulties.
With this book, your child will get acquainted with mechanisms and physical phenomena encountered in everyday life through simple examples.