That one should fill a room quickly! Any decent 400W fogger can fill a 10 foot by 15 foot space in seconds!
For something that I consider fun, I like to fill up small fish aquariums (without fish), with a few drops of milk, and then the liquid contents from a yellow, or orange highlighter.
The highlighter dye is best for blu- rays, because the fluid glows all the way around the beam, and the milk is there so that you don't illuminate the whole tank at once, but end up with a nice and bright beam going through the tank.
Only milk is necessary for reds and greens and such. Placing mirrors at either ends of the aquarium makes for extra beams crossing the aquarium!