• High Quality: This newtons cradle is made of a solid wood base, fishing line, stainless metal balls and frame, durable for long time use, sturdy and not easy to break. Thoughtfully designed packaging protects the pendulum balls from being easily tangled
• Longer Swing Time: Due to the resistance of the air, Newton's cradle balance balls will continue to move for 10-20 seconds. You have enough time to observe the kinetic energy performance of the Newtons balls movement. This is not a perpetual motion machine
• Physics Learning Tool: Learning knowledge in fun. Newtons pendulum is a great tool for students to understand newton's laws of motion, perfect for teachers to use in science physics classrooms. Easy to install, funny and educational
• Office Desk Decor: Special decoration for your office and home. When you are bored or feel tired of your work, play with this desktop stuff, these clicking gravity balls can relax your mind and relieve stress. The newtons cradle pendulum is also a cute gadget to create conversation which has a magic power to attract people to touch it
• Unique Gift idea: This is a great gift for kids, adults, and those who love science and physics on birthdays, Christmas and other holidays. Maybe this nostalgic toy will remind you of the memories of when you were still a kid