The challenge: Arrange these twelve identical-looking magnetized cubes into a tight unit, three cubes by four. It may seem simple, but keep in mind MAGNA-TEASE is considered by many to be the world's toughest puzzle. Misplaced cubes just won't stay put unless you place them in precisely the correct configuration. (And there is only one solution.) MAGNA-TEASE is a puzzle that won't stand still for a wrong move!
Very good vintage condition: one of the cubes is missing a magnet, may be intentional; no instructions other than what is on back of box; no solution sheet, no lid on box. Box has some wear, see photos.