Kids will love the triple play found in this fun gyro wheel that demonstrates the principles of centrifugal force! Amazing rainbow gyroscopic spinning fun. Extra fun in the dark! Three 1.5v batteries included. Experience centrifugal forces first-hand! This classic magnetic wheel toy is of the highest quality in magnetic wheels. Tipping the rails up and down makes the wheel spin and when it spins fast enough the rainbow light effect is activated. Then drop the wheel onto the floor and watch the top spin like crazy!