Your Purchase Supports Scientific and Educational Endeavors at the
American Museum of Natural History.
Space Shuttle Perpetual Motion Desktop Mobile
The space shuttle desk top mobile is a great conversation piece that combines art and motion. It uses both poles of a magnet to rotate in constant movement. For example, whether or not it has a battery, the largest magnet keeps the mobile still while at rest. Add the battery and give the mobile a soft push with a finger and the repellent movement begins. An unobstructed mobile on a flat surface will stay in constant motion as long as the magnetic coil in the base has a battery-powered DC current. Uses 1 9-volt battery (not included) Measures 2.8 x 7 x 7 inches. Recommended for ages over 3 years.