Two awesome chemical experiments combined! Here you can see the well know Elephant's Toothpaste but with a little feature. For those who don't know, Elephant's Toothpaste is an experiment where two solutions (Hydrogenperoxide + Soap and potassium iodide) are combined which then gives you a pile of foam! So what's special about this one? It's glowing bright green under UV light! That's because I added a small amount of Fluoresceine, which is a common fluorescent dye.