Features: *Kinetic Art: It is a fun way to learn science, perfect for kids to experience mechanical fun in classroom education or play with, improving children's ability to explore scientific mysteries.  *Conservation of Energy: It won't last forever due to air resistance and friction. Newton's Law Kinetic Art Ball can move continuously for 8-15 seconds. Good torque and centroid performances. Not only does it demonstrate pendulum motion, but it helps demonstrate the laws of conservation of momentum and energy. *Unique Ornament: Made of plastic, suitable for table sports decoration. Surprise your friends with this clever toy and enjoy the fun of science. *Stress Reliever: Fit for decompression in adults, it's great to release work fatigue and stress after a busy day at work, perfect for outer space science-themed classes or office decor, a great teaching tool for explaining eternal physics. Perfect for birthday, holidays, Christmas, and Father's Day gifts. Specifications: *Material: Plastic *Color: Red (USB Version) *Size: 150 x 100 x 150mm *Weight: 229g, 288g Package Included: 1 x Perpetual Motion Machine Decoration