Ah yes the chemistry set! I used all of the sulfur, a charcoal briquette, and some saltpeter from the pharmacy to make some black powder. I tinkered around with the formula until I got a long burn, unfortunately it was in a glass ashtray which cracked and the flaming contents set my bed on fire. I put it out with a bucket of water getting ready for my aquarium and slept in a damp bed for a night. there was only a small hole in the blankets but the mattress took a bigger patch.