It's a top. It's a yo-yo. It's a Whirl-O! With a flick of the wrist, the magnetic top will whirl around a tin track. Tap it on a hard flat surface and the top will fly off and spin on its own. This funky toy combines all the fun and hand-eye coordination of a yo-yo, without that stringy mess. And magnetism introduces scientific concepts like gravity and centrifugal force. The absence of plastic and colorful designs make this simple, retro toy a fun topper to any stocking. (Rocket USA, $5.95)