Glowing Water

Instructions:

1. Break a highlighter pen.
2. Remove the felt.
3. Soak it in a small amount of tonic water for a few minutes.
4. Turn off the light.
5. Turn on the black light near your water.

 A highlighter pen is broken. The felt is removed. Then it is soaked into a small amount of tonic water for a few minutes. The light is turned off. Turn on the black light near the water.