• These glass balls are environmentally friendly, non-toxic, and can be used for a long time.
• Excellent educational science gadgets. It not only shows the pendulum, but also shows the law of conservation of momentum and energy.
• Science. When you are tired from study and work, you can stir the ball and listen to the clanging sound to ease it.
• Install the battery, it will light up on the substrate, the ball will look colorful and beautiful, very attractive.
• Very suitable for home decoration, study or desk decoration accessories. It is also suitable as birthday gifts