We don’t usually cover projectors (they’re really boring), but here’s an Smurf-sized projector with a lot of moxie. It weighs less than a pound and uses three LEDs to pound a 250 LUX picture into that enclosed space. Mitsubishi suggests using the projector in a car or boat, but if you have enough room to project a video in your car, then you need to rethink your priorities.
Product Page [Mitsubishi]