SAT lesson of the day: The GyroFloater is to a top as smartphones are to the original Moto StarTAC.

Using the principle of magnets (is this magnetic induction?), the top manages to spin and levitate itself in place thanks to the rather large magnet underneath. Grab one for your office and make wickedly fruity David Copperfield gestures when coworkers visit. Do it enough times and they may finally leave you alone.

Product Page [Gyrofloater via TechEBlog]