Glow-In-The-Dark Bath: Fill bath with water and add 2 bottles of tonic water (one that contains real quinine,) a bit of shaving cream, and a bit of neon tempera paint! (Michael's Craft Store has some for $ 2 !) Turn on a black light, and let the fun begin!
A 100% SAFE way to make kids bath water glow. No highlighters. No harmful chemicals. All you need is ONE ingredient found in almost any grocery store. It is 100% edible, safe for kids, and even made for ingestion. (Glowing bath water is just TOO FUN not to try when made in this way)