Description
Features 1. Excellent educational science gadget. Not only demonstrates a pendulum， but also shows the laws of conservation of momentum and energy. 2. Easy to Use---Pull back one or more of the balance balls， release them and the same number of balls will swing up on the opposite side. 3. Made of steel material， bright， preservative and not easy to rusty. Made with a new technology that makes the balls in perfect alignment so you will never have to worry about the strings becoming tangled. Specification Material: Metal， Plastic Color: See Photo Package Includes: 1 x Balance Steel Balls- Brand: Unbranded
- Category: Astronomy Toys & Models
- Fruugo ID: 168676360-360236198
- EAN: 8089221082639
- Sold by: Suzhouyinshimaoyiyouxiangongsi
Comment