2 Pack metal anti gravity gyroscope colorful rotating gyroscope top gyroscope balance toy educational gift How to use: 1. One end of the drawstring goes through the small hole of the middle shaft2. The rotating shaft is made to uniformly rotate the shaft3. A little force can make the gyroscope rotateWarm note: Make sure the base is flat. This is a pure mechanical structure, so no lubrication as bearings, when the gyroscope is rotating, the base of it can have a little shake. Specifications: Material: stainless steel Package includes: 2 x Metal gyroscopesSuit to: people aged over 14 years old.