This timeless scientific instrument has been reimagined in a fresh, new design. Experiment with the gyroscope to learn about the physics of motion, forces, and gravity. Learn about gyroscopic forces, and see and feel them in action. Have fun getting your gyroscope to do classic physics tricks. Make the gyroscope balance on a tabletop, on a stand, and on a string. Spin the gyroscope inside the included clear plastic sphere and see and feel the forces acting on the sphere, which doubles as a storage case for your gyroscope. This individually packaged 3-inch diameter plastic and metal gyroscopes. Each gyroscope includes a clear plastic sphere (also functions as a stand and a storage case), a 30-inch string, and an instruction manual.