It Just Keeps Going…& Going…& Going… Ideal for home or classroom demonstrations, this high-quality gyroscope with adjustable bearings and near perfect balance will keep spinning for minutes when optimally positioned. Includes plastic gimbals, rocker, pivoting housing and instructions. Measures 7.5 x 4.5 x 4.5. Background: A gyroscope is a device that consists of a spinning mass, usually a heavy disk called a rotor, that is mounted on a base. The rotor has a spin axis positioned through the center of it. The rotor is mounted and moves within gimbals that allow it to move freely in any direction. This is mounted within a frame. Because of its ability to move in any direction, the rotor maintains its orientation, regardless of any movement in the base. (Orientation refers to an object being positioned in such a way that one point on the object is fixed.) Picture this: you’re on a boat. The boat has waves coming at it from two sides and is moving up and down, side to side and forwards. You happen to have a gyroscope on the boat. Despite the fact that the base will move with the boat, the rotor will always remain level.