Companion to the Bicycle Wheel Gyroscope (item #752198). Surface is 15.35" in diameter and 2.59" tall, making it ideal for use as a swivel stool top. Students also can stand on the platform and experience conservation of angular momentum by changing their moments of inertia. Throwing and catching weights while on the platform will illustrate Newton's third law of motion as applied to moment arms and torque. Includes instructions. Weight limit, 250 lb.