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. <br> <br> <b>Features:</b><br> Sizes: 230*110 mm/9.06* 4.33 in.<br> Weight after packing: 250 g /0.55 lb.<br> Material: steel.<br><br> <b>How to play: </b><br> Let the steel little guy stand on the steel cylinder base, and give it a gently push.<br> You can let the little guy stand on only place, but please try carefully and slowly, just avoid any drop and break. It’s proving the scientific theory and mesmerizing you for hours. Fair warning: it's totally addictive!<br><br> <b>Attention: </b><br> It is not an item that never stops working. It moves and swing after you push, and finally it will stop due to the resistance of the air and friction if you know more about the law of energy conservation, you will not ask why.<br><br> <b>HISTORY OF THE TOY:</b><br> 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.<br><br> <b>100% SATISFACTION GUARANTEE</b><br> We're so confident that you'll agree our model is the best that we're offering a 30-Day DARE TO COMPARE Money Back Challenge! <br> Be sure you receive an authentic Sunnytech with our logo to ensure 1-year 100% Satisfaction Guarantee <br><br>