Smithsonian Perpetual Motion Machine
Build your own "perpetual motion" machine!
Learn about the properties of physics and play with your creation!
includes
- 1 Perpetual Motion Machine
- Colour Poster With Instructions
product features
- Build your own "perpetual" motion machine!
- Learn about the properties of physics
- Powered by an invisible Magnetic Field
- You Make It.You Play with It
Item# 133601