wheel+and+axle

media type="youtube" key="IrlaODY4x_o" width="425" height="350"Here is a video that helps describe the wheel and axel.
 * // The Wheel and Axel are a simple machine that helps you move things easier from place to place. Instead of carrying stuff, you can just set it in a wagon or something. Some good examples that use the wheel and axel are cars, wagons, and bikes. //**