Automatic Swinging Perpetual Motion Machine
This is a classic tabletop accessory that is both fun and useful. Put it on the table to kill time, relieve stress, or teach young people about physics. Your co-workers will love relaxing with this after a long day at work. This toy demonstrates the conservation of momentum and energy, resulting in a perpetual motion machine, perfect for tabletop display. It is also the perfect decoration for desks and tables.