It's 2009, and glow-in-the-dark stick-em-up stars simply won't do any more. In the era of accessibility to LEDs, fiber optics, a quite accurate (albeit 2D) home planetarium can be had with a bit of wiring and alot of holes.
From Hack-a-Day: "[Mike Galloway] set out to install a lighted starscape in the ceiling of the baby room...This setup involves an LED based illuminator and bundles of fiber optics. [Mike] first mounted the illuminator in the corner of the room at ceiling level and ran the bundles of fiber optics up into the attic. He then used a cordless dremel to drill 1/16″ holes, one for each fiber in the bundle...Once everything was in place, he filled the holes with glue to hold the fibers in place, and snipped off the excess from the room-side using a fingernail clipper."