Perplexus (formerly known as Superplexus) is a 3-D ball-in-a-maze puzzle or labyrinth game enclosed in a transparent plastic sphere. By twisting and turning the sphere, players attempt to maneuver a small steel ball through an intricate maze composed of 100 steps along narrow plastic tracks. Additionally, some of the steps involve dropping the ball into a cup or through a small rim to take advantage of its three-dimensional nature. There are obstacles of varying difficulty that must be navigated in order to reach the end.
Perplexus was co-invented by teacher and magician Michael McGinnis and toy inventors Brian Clemens and Dan Klitsner of San Francisco-based KID Group—known for the invention of the games Bop It, HyperDash, and other titles. McGinnis first sketched ideas for three-dimensional labyrinths in the late 1970s but it was several years before showing the sketches and rough prototypes to Dan and Brian in 1999. After a year of collaboration and many prototypes later, they perfected the play so that it was easy enough for a young child to start, yet challenging for any age due to its many levels. A version with an electronic timer named Superplexus was launched in 2001, but with limited availability. There are currently four kinds of Perplexus—Rookie, Original, Epic, and Twist.
From Wikipedia: http://en.wikipedia.org/wiki/Perplexus