What the motion machine can offer you is that is a simple and fantastic method of learning about physics knowledge and a good way to relax your mind for a while.Designed with a stable construction, the perpetual motion machine can be placed on the desktop stably without shaking or falling off.Made of wrought iron and plastic, it is durable and sturdy.The length of the motion machine is 25cm, the width is 23cm and the height is 11cm.It is suitable for decorating bedroom, living room, office, classroom, dorm, etc.Item Name: Motion MachineMaterial: Wrought Iron, PlasticFeatures: Perpetual Motion, Educational, Celestial ModelBattery Supply: 4 x AA Batteries (Batteries Not Included)Size Details:25cm x 23cm x 11cm/9.84" x 9.06" x 4.33" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Motion Machine