MAGNETIC FRIDGI GEARS W/LIGHTS Fun On The Fridge Even as you read this, our office refrigerator is playing all by itself. Yours could, too, if you had this extremely cool set of automatic working-gear fridge magnets. Very instructive for budding engineers, just plain fun to watch, and, we assume, amusing for the ice box itself. You&#39;ll get (20) 3/8" thick plastic gears in assorted neon colors, all of which interlock in various patterns and turn all by themselves, driven by the 5" dia x 2" thick motorized gear/picture frame that runs on a couple of "AA"s that you provide. Gears include (7) at 4-5/8" dia and 3-1/2" dia and (6) at 2-1/2" dia. Buncha bright stickers included at no extra cost.