A lever is a bar that's attached to a pivot (turning point) called a fulcrum. You use a lever when you flush a toilet, paddle a boat, or cut with scissors - they're everywhere! Some are good at moving something heavy. A crowbar, for example, can pry open a door that's stuck. Levers can also make something move fast. A baseball bat hitting a ball, for instance, or a catapult hurling a stone. In this "Fetch!" activity, create a Jumping Jack puppet with levers and string. Then make it dance!