Lite-Brite is an electric toy introduced by Hasbro that allows lit pictures to be created.
Lite-Brite allows the artist to create a "glowing" picture by placing multi-colored translucent plastic pegs through opaque black paper. The light from an illuminated light bulb is blocked by the black paper except where the pegs conduct the light. When lit, the pegs have an appearance similar to that of LEDs. Most Lite-Brite toys come with a series of pre-prepared patterns. Classic patterns include the "Wizard of Light" (a picture of a wizard with the "Lite-Brite" name above), and the clown. In the last few years, the Lite-Brite has gone through a major make-over into a sleeker, flat-screen version of its classic self.
P.S. It now comes in an iPhone App.