Perpetual Motion, Kinetic Mobile, Electromagnetic Gizmo, Whirlygig.. whatever you call these things, it will mesmerize you for hours. This kinetic mobile is the O-G... bonafide ORIGINAL kinetic mobile from the 90s. It is a must-have for serious collectors.. or seriously cool people. It's retro and vintage-y.. minimalistic and, you know, it checks all the right boxes. 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: Color Free Balls 8" (556C) Material(s): Plastic Units/Pack: 5 Pieces Uses 1 9V battery, not included in package.