125 Powerful Rare Earth Magnets Cubes

Buckycubes are even easier than Buckyballs to pick up...but just as impossible put down. Fold them around one another and watch as they grab their neighbor at each turn.

getbuckyballs.com - $24.95

Ferrofluid Science Project Kit

This kit includes everything you need to experience the wonders of ferrofluid. See magnetic lines of force rendered through an oil based liquid with microscopic iron particles in suspension. Kit includes: ounce bottle of Ferrofluid, neodymium magnets - 0.75 x 0.5 x 0.25 block & 5/16" diameter disc, 60 x15 mm petri dish with lid, 7ml pipette/dropper, pair vinyl gloves.

amazon.com - $16.99

BOUGHT Neocube

theneocube.com - $24.95
getbuckyballs.com - $29.95

UPDATE: Awesome thing! Bought lots of these as presents for male friends. Anybody who touches it can't stop playing with it. Great time killer. Watch out for loose balls and keep magnets away from credit cards.