Specification: Size: 25 * 22 * 10.5cm Material: ABS plastic Power supply: 4 x AA batteries (not included) Package includes: 1 x physical pendulum This dynamic sculpture has a ball rotating around the ring, like a rotating Ferris wheel, the perfect rotating art for your desktop. Large decoration This is the perfect tabletop spoon to impress colleagues and customers. It is very suitable for home decoration, study or desk decoration accessories. It is a stylish, innovative and perfect gift for those who are passionate about science. With game toys, you can experience the fun of a mechanic, which will fascinate you and everyone else for hours. Easy to use The balance ball will continue to run until you stop it or turn it off.