Brand new and high quality.
Not only demonstrates a pendulum, but also shows the Laws of Conservation of Momentum and Energy.
Friction and damping effects are also observed.
Often used as a toy to amuse people.
Great gift for everyone.
Size:7.5cm x 9cm x 9cm - 2.95inch x 3.54inch x 3.54inch.
1 x Newton's Balance Balls Desk Toy
NO Retail Box. Packed Safely in Bubble Bag.