Takes a look at levers, what they are, how they are used, and how they help us.
Each book in this series focuses on a type of simple mechanism and examines how it is used to make different toys work. This book examines levers and uses simple language and labeled photographs to explain the scientific principles behind their use.
Different toys 4 Levers 6 More toys with levers 12 Quiz 22 Picture glossary 23 Index 24