The “Polygon Playground” is a new art & technology project by WhiteVoid.  It consists of a large scale interactive object that can accommodate up to 40 people at the same time. The installation features a software aided 3D surface projection system to cover the object with a seamless 360 degree projection mapping. An additional sensory system detects peoples positions and proximity and changes continuously according to presence, movement and touches of its visitors.

Their hardware and software system can be applied to any 3D body to turn it into an interactive object.
Here’s the project web page: http://www.polygon-playground.com/