Coin-Eating Robot

Save up in style — and explore engineering! — with a coin-eating robot you built yourself. Construct the body, connect the motor and cams, and wire up a circuit that becomes complete when you place a coin on the robot's tray — causing the robot to gobble the coin right up! Read all about the science of circuits, switches, and other electromechanical marvels like your money-munching bot!Read more