Safely demonstrate rotational motion from the security of a chair. Sitting down will keep your center of mass over the rotating platform making it easier to maintain balance. Students can concentrate more on the rotational science, instead of gravity. Rotating turntable seat is made with the same high-quality, low-friction hub as the stand-alone Rotational Platform, AP4609. Interlocking wood parts make the labstool very strong and sturdy. Can be easily disassembled and stored. Or, connect it permanently using the glue provided. Stands 65 cm tall. Seat diameter is 30 cm.