I love when I walk into an office and they have these on the desk! These are such great conversational pieces to have and they require no electricity.
Arc-shaped Newton’s Cradle Balance Ball Science Puzzle Fun Desk Toy Gift Dreamyth
- Quantity:1pcs. Product Material: metal and plastic.
- Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy
- Friction and damping effects are also observed
- Includes steel balls, plastic frames and base
- Easy and convenient to use.
Prices change all the time, so be sure to check your prices before purchasing
I love these..I want one..they are just so mesmerizing!