CAMBRIDGE, Mass--The MIT Media Lab opened its doors to outsiders today during its 25-year anniversary celebration to show current work, including projects from the Fluid Interfaces group.

One such project from that group is called LuminAR, which is a system for projecting computer interfaces on to everyday surfaces. The device, which screws into a light bulb socket, can track the gestures of people and project images. A person could, for example, have an "augmented magazine" that combines both paper and digital data. Or people could scan items, such as soda cans, to get more information. Pictured here is an earlier version of LuminAR.