Feature:
Premium quality: This cradle balance balls is made of ABS and steel material, bright, preservative, not easy to rusty and durable to use
Education Toy: It is a newtons cradle pendulum balls, not only demonstrates a pendulum, but also shows the Laws about conservation of Momentum and Energy
Decompression toy: It is a very funny decompression toy, and that a ball can be used to hit other balls and swing. It looks funny and also can be to amuse people
Widely use: As a creative decompression desk toy, It not only can be a funny gift to your friends, family and children, but also perfect for decorating in the office, home and other indoor places
Size:9cm*7.5cm*9cm