The human mind has invented a lot of constructions and machines! All of us try to find solutions to make our lives and our work easier and faster. This is how the pulley was born! But do you know what exactly it is?

In the pages of this book, you will discover their secrets and what they can do to make your life easier! You will learn how you can lift a very heavy object without using much strength!

In simple words, with fun, colorful drawings and many interesting experiments, you will play with your friends or your parents and understand how they work and why pulleys are so essential to us! Thus, you will become a Little Scientist too!