We've seen portable versions before, hours of frustrating fun, but the inventor ofthe original Superplexus has come up with this monster. Available from US superstore Hammacher this would make an amazing addition to any boardroom, here are the manufacturer stats : Superplexus is a complex network of chicanes, multi-planar hairpin turns, spirals, and staircases--even a vortex. Over 400 hours are involved in its construction. The labyrinth is set inside a 36" diameter acrylic sphere, the entire track laid out in a straight line is longer than a football field. In addition to the track, the ball must travel on a 1/16" diameter stainless steel wire pathway at eight points along the journey. A series of directional arrows indicate the course to follow, and successful completion requires a minimum of 425 turns (plane changes) of the sphere--without letting the marble fall off the track. The price? $30,000 I'm afraid, so it'll be bankers boardrooms only for now.