Colorful Plastic Square Newton's Cradle Home Tableware middle white

Newton's Cradle is a classic!Also known as balance balls,these steel balls keep you entertained throughout the day.Pull back one or more of the balls and let them drop down.Newton's Cradle is fun and scientific.Start a kinetic chain reaction with one ball.

Features:
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.
The perfect desk decoration for home or office.

Specifications:
material:plastic,metal ball
size:big 14.5cm*17.5cm*18cm, middle  11.5cm*13*13.7cm
color:middle white,middle orange,middle purple,middle green,big black,big green,big orange,big purple
weight:600g,1kg