wheels

Introduction to wheels, one of the simple machines.

A runaway wheel takes a bouncy, bumpy, noisy journey through town.

Introduces the science of how wheels and axles work and describes different kinds of wheels and the use of wheels throughout history.

Simple text and photographs demonstrate how wheels are used in the world around us for work, play, and transportation.

Discusses the discovery and evolution of the wheel and its many different uses.

Outlines the characteristics and advantages of a wheel and axle and highlights a variety of ways this simple machine is used in real-world situations. Features several hands-on activities, full-color photographs, and a glossary.

Illustrations and rhyming text present examples of many things that wheels do, from whizzing and whirring to racing and towing, depicting several different items with wheels, including cars, bikes, skateboards, and planes.

A group of children demonstrate the concepts of rolling and sliding, and the use of wheels, in their everyday life.

Explores different machines created by the ancient Chinese, Middle Easterners, Greeks, and Romans including wheels, pulleys, levers, war machines, and wheelbarrows.

Presents an introduction to wheels, in simple text with illustrations, explaining how gears, axles, cranks, and belts help wheels spin and move people around.