With a flash of light, kids' shadows are “caught” on a glowing screen — that’s the magic of Shadow Magic. The Shadow Magic Light Blaster emits a high-intensity flash of strobe light manually or automatically. The 23" by 28" sheet of vinyl has one side coated with a special photoluminescent material. This material captures the shadow of an object as it's exposed to the flash of light, hence the term glow-in-the-dark. The built-in penlight on the light blaster allows kids to "draw" on the glow screen. A door clip and string lets kids hang the screen on a door.