InterPlay is a platform for designers in the Media Lab to create dynamic social simulations, which transform public spaces into immersive environments where people become the central agents. It utilizes computer vision and projection to facilitate full body interaction with digital content.

Mouseless consists of an Infrared (IR) laser beam (with line cap) and an Infrared camera. Both IR laser and IR camera are embedded in the computer. The laser beam module is modified with a line cap and placed such that it creates a plane of IR laser just above the surface the computer sits on. The user cups their hand, as if a physical mouse was present underneath, and the laser beam lights up the hand which is in contact with the surface.