Install batteries,and the balls will look colorful and beautiful, very attractive
Balance pendulum ball could last for 15‑20 seconds due to the resistance of the friction, you can discover more fun and stress relieving ways to play it.
You can push one ball on one end strikes adjacent sending the one on the opposite end while the ones in the middle stay perfectly still, or two, or more, which can bring you much fun.
Balance ball craft is a fascinating decoration for your office desks, which is not only could add beauty to the room, but also relieve stress when you playing.
Desk pendulum ball is also a perfectly educational gadget for schools, which can lead kids to understand the meaning of energy conservation.
These glass balls are environmentally friendly, and are designed to last for a long time.Great for home ornament, study or office desk table decor accessories, etc. Also good for birthday gift.