HOW TO PLAY---- Let the steel little guy stand on the steel cylinder base, and give it a gently push. You can let the little guy stand on only place, but please try carefully and slowly, just avoid any drop and break, it is proving the scientific theory and mesmerizing you for hours. Fair warning: it's totally addictive. . Please measure the size with ruler instead of image the size in mind. 18.5*17.5CM SWING TIME---- Most of material is silver steel, has a smooth surface, will not rusty and fade, always looks as good as new. The toy continued in perpetual motion for ONLY 2-3 minute due to the resistance of the air and friction. BALANCE TOY---- One-legged Hercules, holding up two big steel balls with two hand, swinging merrily when the wind blows or touches them lightly, but it's a bit difficult to get it to fall. It's very balanced, like a tumbler. It can stand in a lot of places you unexpected, such as hand, vehicle and so on. EXQUISITE GIFT----This is an amazing and fantastic product at this price, 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.