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The Luminous Ground Glass Pendulum Newton's Cradle Steel Balance Ball Desk Toy, also known as balance balls, is a classic desk toy. With a simple construction, it demonstrates the law of conservation of momentum and energy. Believe it or not, these ground glass balls will give you a soothing experience and is definitely a great way to take a break during a stressful day. The light built in the base creates a stunning light effect. It also makes a thoughtful gift for your loved ones.?
|Material||Ground Glass & Plastic & Metal & Fishing line|
|Dimensions||(4.72 x 4.72 x 3.54)" / (12 x 12 x 9)cm (L x W x H)|
|Weight||7.05oz / 200g|
|Power||4 x AA Batteris(Not Included)|