Books in How We Work series

Each book in this series focuses on a type of simple machine and examines how it is used to make different toys work. The books use simple language and labeled photographs to explain the scientific principles behind each machine. Titles in the series include: Levers; Pulleys; Ramps and Wedges; Screws, Nuts, and Bolts; Springs; and Wheels and Axles.

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 ramps and wedges, and uses simple language and labelled photographs to explain the scientific principles behind their use.

Simple text and illustrations introduce the daily work of an automobile mechanic