Read and find out about six simple machines—the lever, the wheel and axle, the pulley, the ramp, the wedge, and the screw—in this colorfully illustrated non

This is a unique interactive guide to understanding simple machines and mechanisms. Each page introduces you to a key mechanical principle that you put into pra

Introduces six simple machines, describing how they work in more complex machinery and how they are used every day.

Uses simple experiments to explore wheels, pulleys, levers, friction, and lift in terms of inventions and discoveries underlying the modern mechanical world.

"Simple Machines! introduces kids to the concept of mechanical advantage and harnesses kid-power by inviting them to build machines of their own design. This bo