Rubik’s cube still got you puzzled? Then forget the Gear Wheel IQ Cube. This 21st century version features a series of orderly colored cubes, but seems like an altogether alien version of the classic. Its twistable pieces are designed to work as gears. Rotating a single one causes the other pieces to rotate in a chain reaction. Sound simple? Probably not, but they don’t call them brain teasers for nothing. $12
