ZCtron 2022tons Cradle Balance Balls Stress Reliever Physics Science Pendulum Desk Toy

Features 1

Excellent educational science gadget

Not only demonstrates a pendulum, but also shows the laws of conservation of momentum and energy

2

Easy to Use---Pull back one or more of the balance balls, release them and the same number of balls will swing up on the opposite side

3

Made of steel material, bright, preservative and not easy to rusty

Made with a new technology that makes the balls in perfect alignment so you will never have to worry about the strings becoming tangled

Specification Material: Metal, Plastic Color: See Photo Package Includes: 1 x Balance Steel Balls