Introduces the wheel and axle as a simple machine that can make it easier to move heavy objects, as well as to flatten dough.

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

We use wheels and axles several times every day. Young readers will learn how a wheel and axle work together, how they make work easier, and how they are used i

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