Why are some things hard to push? Read this book to find out about how pushingmakes things move. Books in this series introduce children to simple forces.Each b... » 

Why are some things hard to push? Read this book to find out about how pushingmakes things move. Books in this series introduce children to simple forces.Each book uses simple repetitive text to teach children basic vocabulary andincludes stunning photographs that show how different forces are at work in theworld around us. In Push children learn about things that we commonly pushwhy things are hard or easy to push and the effects of big and small pushes. «