Glowing Tonic Geyser Add a little black light and tonic ...

Bottle of tonic water (unopened) Drinking glass, clear . Darkened room If you want to do Steve's Mentos Glowing Geyser demo, you'll need a roll of Mentos, a 2-liter bottle of tonic water and a Geyser Tube (or another creative way to drop the Mentos into the soda). 1. Open the tonic water and pour some into a large, clear drinking glass. ................
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