Every time you turn on a faucet, ride a bike, or open a door, you're using a simple machine called a wheel and axle. This book uses clear text and practical, ev

13 hands-on activities encourage children aged five to nine to explore simple machines (the lever, wheel and axle, pulley, inclined plane, screw and wedge) and

"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

Uses everyday examples to show how wheels and axles function as simple machines.