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

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

A very basic introduction to screws, levers, planes and more.

Introduces simple machines, including screws, levers, wedges, and pulleys, describes how each makes everyday life easier, and provides activities demonstrating