Describe: The method of use is simple and convenient. It's a nice gift that we can give to our friends, kids, family. A stylish tabletop toy for adults and children. This is the perfect tabletop toy to impress colleagues and clients! Perpetual motion tabletop toys are perfect for your outer space themed office or room decor. Versatile - A beautiful decoration to place in your home, school or office. A simple spin on the top of the base launches the galaxy. A bestseller in the Space Museum store, and a cool gift for science physics lovers. This is fun and useful for kids who want to learn more about magnets and physics. Specification: Item Type: Perpetual motion tabletop toys Product material: metal, plastic. Color as shown Dimensions: 6.89x 4.33x 8.90in Weight: 6.8OZ Power supply method: Requires one 9V battery to operate (battery not included).