This is what happens when you burn zinc and sulfur...

Burning zinc and sulfur makes zinc sulfide, which can be used to make glow in the dark powder. Making it by burning zinc and sulfur is fun, but the quality is usually garbage, and it won't glow. To make stuff that actually works, it's a much more difficult process. A little while ago, I was able to make some on my main channel, and I used it to make a weird creepy baby thing.