Desk toy rotating swing balance ball perpetual motion learning toy, it is not only a birthday gift or Christmas gift for your children, but also a great art for home and office accessories. Parameters: Material: metal and plastic. Size: approx. 19 x 10.8 cm / 7.48 x 4.25 inches. Weight: over 250 g. Function: desk toy rotating swing balance ball perpetual motion learning toy The scientific learning toy for children shows the principles of impulse and energy preservation. It also has more uses waiting to be discovered by you, such as For example, increasing the number of levels, the mobile phone holder, etc. Battery: 4 AA batteries (included) or USB port. If you have any dissatisfaction or doubt about our products, please contact us for the first time via the buyer's messages. We will offer you a satisfactory solution within 24 hours.
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