Air Puck Physics
These pucks float on a cushion of air generated by an internal fan and electric motor. The batteries are rechargable and the puck runs for 1/2 hour on a full charge.
The pucks are good for demonstrating Newton's first law, as well as, collisions. To have the puck move in a circle requires continuously hitting it towards the center of the circle.
Maybe it's good for some broom hockey too!