Balance Ball Toy Creative Home Ornament For Office Desk Recommended

Feature: \n 1. Pull back one or more balance balls and release them, the same number of balls will swing up on the other side\n2. This desktop toy provides you with many entertainments, suitable for various places such as home or office\n3. When you are tired of learning and working, you can put it on your desk, a cool and nice desk ornament for office\n4. Excellent educational scientific tool not only shows the pendulum, but also shows the law of conservation of momentum and energy\n5. Suitable for home decoration, study or office table and chair decoration accessories. Also suitable for birthday gift and children's toy \n\nSpecification: \nThis device demonstrates the conservation of momentum and energy through a series of pendulum balls. Pull back one or more balance balls and release them, the same number of balls will swing up on the other side.\n\nFeatures:\n\n--\n\nPull back one or more balance balls and release them, the same number of balls will swing up on the other side.\n: