Features: 1. Kinetic Art Perpetual Motion: A fun way to learn science, ideal for kids in classroom education or play, helping children explore scientific concepts. 2. Conservation of Energy: Movement is limited due to air resistance and friction. The kinetic art ball can move continuously for 8-15 seconds. Features good torque and balance. Demonstrates pendulum motion and illustrates the principles of conservation of momentum and energy. 3. Unique Ornament: Made of plastic, suitable as a decorative desktop item. Surprise friends with this engaging toy and enjoy science-based entertainment. 4. Stress Reliever: Suitable for adults seeking relaxation, helps relieve fatigue and stress after work. Ideal for science-themed classrooms or office decor. Great educational tool for teaching physics concepts. Makes a thoughtful gift for birthdays, holidays, Christmas, and Father's Day. 5. Available Options: Yellow (USB Version), Red (USB Version), Wine Red (Battery Version). Specification: Material: Plastic Color: Yellow (USB Version), Red (USB Version), Wine Red (Battery Version) Size: 150 x 100 x 150mm Weight: 225g, 275g Package Included: 1 x Perpetual Motion Machine Decoration