Feature

●100 warranty: we promisesy customer 100 shopping satisfaction, feel free to if you have any questions about your purchase.we will give you professional and detailed reply.
●easy to use: just pull one or more back and release them, and the same number of will swing on the other side., wooden marble gravity game
●wooden marble gravity game, relieve your stress office desk decoration, when you are tired of studying and working, you stir the to see the swing and hear the jingling sound to reduce stress.
●swinging marbles for relaxation, when you are tired of studying and working, you stir the to hear the jingling sound to reduce stress.
●high quality material this is made of high quality metal material, sturdy and durable to use and and the unique idea.


Description

1. An excellent educational science tool shows the swing, but also the law of conservation of momentum and energy.
2. When you are tired of studying and working, you can stir the balls to hear the jingling sound to reduce stress.
3. Owning scientific history and exploring the important value of physics, suitable for birthday gift and childrens toy.
4. Pull one or more ballss backwards, release them, and the same number of ballss will swing on the other side.
5. Interesting and suitable for decoration, perfect for home decoration, study or office table decoration accessories.

Specification:
Condition: 100% Brand New
Item Type: Home Ornament
Material: Metal
Product Size: Approx. 8 x 7 x 9 cm / 3.1 x 2.8 x 3.5 in

packing list:
1 x balls Toy