wheels

Describes in simple terms the wheel and how it works.

Presents rules for being safe on bicycles, scooters, skateboards, and in-line skates, and discusses the importance of safety gear.

Looks at basic devices such as wheels, pulleys, levers, screws, and slopes, and suggests simple experiments and projects to demonstrate how they work.

Primarily a pictorial essay on the development of the wheel starting with the ancient Egyptians to the present.

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

Photographs and simple text in both English and Spanish describe how wheels and axles work in simple machines.

Explains how wheels are used.

Traces the development of the wheel and its use in machines and transportation from earliest times to the present.