KidWind Power Output Board, includes a visual voltmeter, LEDs, resistors, a capacitor, and a sound generator, This device makes it very easy to demonstrate and measure the power output of your small wind turbines or solar panels.
Air Puck, perfectly balanced and glides on a cushion of air for nearly frictionless motion across any smooth surface. Sturdy bumpers will survive collisions with walls, shoes, or other Air Pucks.