Just look at the picture. How great are these? Works with black lights as well. 12 pieces. details

LEDs and a tiny battery make these earrings light up. Sold individually. details

Sure Commissioner Gordon had the red batphone, but in a real emergency, he projected the bat logo up in the sky, and now you can too, if by "the sky" you mean "your ceiling." And, the Mini-Batman Mini-Bat Signal comes with a Mini-book. details

Hot and cold running blue and red water! details

These look pretty opaque, and would look pretty strange floating around the room. And they're stain-free! details

Set of 3 almost 4" wide. If you charge them up and drop them on someone who used to play a lot of Space Invaders while they're trying to sleep, they'll find it very memorable. details

You could tie an actual bow on a gift, or you could do it the modern way and use wrapping paper with a fake bow that looks like a 3D bow to someone with the right glasses. Includes two pairs of the right glasses. details

When you blow bubbles from this liquid, they glow under a blacklight, with that special flourescent blacklight glow. details