Popular Schools Resource! BEST SELLER!
 
Perfect for demonstrating Newton’s Laws of Motion, energy, and momentum. Perfectly balanced puck 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. 7-1/2 in. dia. x 2-1/2 in. tall. 
Includes teacher’s guide. 
Requires four AA batteries (not included).