The Best Tonic Water Under Black Light Ideas. Web plastic stars, toys, urine, and tonic water are some things that glow under black light. In this science activity, you will make tonic water glow by using a black light, and then you will add a little bleach to the water.

If you were to look at a gin and tonic (or vodka and tonic) under ultraviolet light, you might be surprised to see it glow. Make the invisible message less conspicuous by writing a cover message. The cinchona tree ( cinchona ledgeriana ) is native to south america—particularly peru, bolivia, and ecuador—where it is known as quinquina.