Glow in the Dark Water
Pull the end off of a yellow highlighter. This may take a little working at it. Then pull the wad out that holds the dye(where gloves or you will dye your hands). Holding it over a glass under a very slow trickle of water squish the dye out of it slowly.
It won’t glow until you shine it with a black light. It really looks cool when poured in to a little table fountain with the water circulating through it.
Do NOT drink it! Don’t say you were not warned!
photo by: psyhampster