Balance Balls Toy, Newton's Cradle Steel Balance Ball Physics Science Pendulum Desk Fun Toy Gift

• This device demonstrates demonstrates conservation of momentum and energy via a series of swinging balls.
• Pull back or more of the balance balls, release them and the same number of balls will swing up on the opposite side.
• Science toy. When feeling tired of studying and working, you can stir balls to hear the clinking sound to ease.
• Great for home ornament, study or office desk table decor accessories, etc. Also good for birthday gift and kids toy.
• Size: 9.2 x 7.5 x 9cm / 3.62 x 2.95 x 3.54 inch(appr.)

Specification: Condition: brand new Material: Plastic + Iron Color: Sliver Size: 9.2 x 7.5 x 9cm / 3.62 x 2.95 x 3.54 inch(appr.) Package Included: 1 x Balance Balls Toy Note: 1. Please allow 1-2 cm error due to manual measurement and make sure you do not mind before ordering. 2. Please understand that colors may exist chromatic aberration as the different placement of pictures.