Features: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.
Includes steel balls, plastic frames and base.
Great gift for everyone.
Size:18cm x 11cm x 14cm - 7.09inch x 4.33inch x 5.51inch.
Package Included:1 x Balance Balls Desk Toy