Perpetual Motion, Kinetic Mobile, Electromagnetic Gizmo, Whirlygig.. whatever you call these things, it will mesmerize you for hours. Like a real ferris wheel, this kinetic mobile will bring out the inner child in each of us. Our kinetics are great for man caves, children's rooms or boring offices and suitable for kids of all ages, including that man-child we all have in our lives. -- Kinetic Mobile: Silver Suspension Cosmos 12" (1103) Material(s): Plastic Units/Pack: 2 Pieces Uses 2 AA batteries required, not included in package.