Features: 1. Kinetic Art: Marble perpetual motion machine is a very unique toy/decorative gadget. Creative Gift: Surprise your friends with this clever toy and make them scratch their heads. Everyone will love it. Material: Wooden parts are made of high quality wood. The wires are made of stainless steel. Desk Decor: Express your personality and express your love of science and physics by decorating your office space. Also contemplative and fun to watch! Education and Elegance: A Visual Display of the Power of Experience. Use it in the classroom and share the exciting world of physics and science with your friends and family! The Art of Beauty: Infinite Looping Perpetual Motion Machines will blow your mind. Jumping small metal balls on your desk is a work of art. This will relieve your tension and stress. The wooden parts are made of high-quality wood. This wire is made of stainless steel. Cute, simple, modern design, easy to grab people's attention. 2. Stress relief: Are you stressed? Let's take a break. This gives your eyes a place to focus when you need to clear your mind. When you're bored and stressed out, you can put it on the table, start it, and watch its charming wiggle quietly, and it will mesmerize you. It can kill time and help you relieve stress. 3. High-quality material: Replace cheap plastic with high-quality stainless steel. Impressive with a wooden base made of high-quality wood and a unique design concept. Reliable, sturdy accessory for table sports decoration. Use kinetic energy to keep the ball in an infinite loop. Surprise your friends with this clever toy and make them scratch their heads. Everyone will love it. 4. Working principle: Working principle, using the principles of dynamics and gravity to keep the metal ball rolling and falling. Newton's Law Dynamic Art Ball can move continuously. Good torque and centroid performance. Not only does it demonstrate pendulum motion, but it helps demonstrate the laws of conservation of momentum and energy. 5. Wide range of applications: This is a classic desktop accessory that is art in motion. When you put this cool desk toy on your desk or home desk, it will be a great icebreaker. It's also great for courses on outer space science topics, or anyone with a passion for science or demonstrating the laws of physics in science class, and it's a great teaching tool for explaining eternal physics. Specification: Material: Plastic, Metal Product size: 15*15*10cm Color: Yellow/Red/Wood packing list: Electronic perpetual motion machine*1, steel ball*5, USB charging cable*1