EXQUISITE DESIGN- a great physics science educational toy that can help children easily understand the principles of conservation of momentum and energy. This high-quality, museum-style sports sculpture gives people the illusion of perpetual motion and aims to confuse and amaze all onlookers.FINE ART- Rotating gadgets are great for anything environment, ideal for meeting rooms, offices, waiting rooms, shop windows and lobbies. Wherever you are, this sculpture will provide you with relaxing entertainment and become the center of attention.HOW IT WORKS - This rotating perpetual motion gadget is powered by 4 AA batteries. Move it gently, and it will oscillate until it stops or goes out, creating a pleasant hypnotic effect. (Batteries not included)QUIET - This dynamic sculpture is an exquisite work of art and operates completely silently, so it is recommended to be used in a quiet office environment. The antique hemispherical frame and elegant design are very suitable for home and office.