Balancing toys were popular in the 19th century. Dating back to ancient China and India, where they were most often carved from soft wood, the western balancing toys were traditionally made from tin or metal. Illustrations of balancing toys can be found in educational literature from the 18th century. The physics governing the movement of such toys intrigued and amazed people. Balance toys came in various forms, and our particular shape is traditionally. This classic desktop toy provides you many benefits and entertainments, is suitable for various locations such as house or office, and is an intriguing device that not only demonstrates pendulum motion, but also helps to show the laws of Conservation of Momentum and Energy. Whether you are studying physics knowledge, working on complex analysis, or looking for a delicate gift, this toy is definitely what you really want. WELL-MADE Most of material is silver stainsteel. Chromium plating process, the functional mainly reflects in wear-resisting, has a smooth surface, will not rusty and fade. Ingenious designs and unique style, let you own your attractive desk decoration. EXQUISITE GIFT This is an amazing and fantastic product at this gift, it can be a great gift to your families or friends. It also can be used for teaching purpose, many of our customers comes from school, colleague, easy to install and uninstall. TIME KILLER It's a classic and funny desk toys, this cool toy like be a good icebreaker when you lay it in your office or your home, it is a perfect desk toy to kill time, relieve stress and tune out boring coworkers without go out of the office. Read more GOOD FOR TAKING A BREAK This is something that gives your eyes a place to focus when you need to clear your mind. It's built sturdily. I can imagine your colleagues pausing from work and chilling out for a bit watching this. BALANCED It's balanced on a tiny screw, which makes you feel really incredible, you can give the its body a gentle push to make it work, slow down the speed when time passed and finally stop. You don't have to worry about it falling off, it can be well keeping balance. It will rotate 360° around the center stand balance. The toy continues in perpetual motion for ONLY 20-60 seconds due to the resistance of the air and friction. ENTERTAINMENT & EDUCATION This classic desktop toy provides you many benefits and entertainments, is suitable for various locations such as house or office, and is an intriguing device that not only demonstrates pendulum motion, but also helps to show the laws of Conservation of Momentum and Energy. Read more HOW TO PLAY: You can give the balance arm a gentle push to make it work, slow down the speed when time passed and finally stop. It’s proving the scientific theory and mesmerizing you for hours. This classic desktop toy provides you many benefits and entertainments, is suitable for various locations such as house or office, and is an intriguing device that not only demonstrates pendulum motion, but also helps to show the laws of Conservation of Momentum and Energy. Whether you are studying physics knowledge, working on complex analysis, or looking for a delicate gift, this toy is definitely what you really want. FEATURES: Material: Steel, brass. Dimensions: 60mm(L)*190mm(H)/ 2.36in(L)*7.48in(H). Occasions: office or home desk decor. Product Net weight: 200g / 0.44lb.