What is the power?

In the store, both Safe and Youssef feel bored, so they start wondering about how shopping carts move, and their father tells them that they move because of forces! But, what does force mean in essence? With the help of the scooter, the wheels, and a football match, they quickly discover more about it. This book is an ideal model for home or classroom; it contains notes for parents and teachers, with suggestions for exploring and interpreting scientific topics. Size: 20.5*18.5 cm. Number of pages: 32 pages.