I'm currently preparing to teach some science demonstrations for local kids this summer and thought to try this giant black snake fireworks experiment to see if it would be a suitable thing to include. I've wanted to try this experiment ever since the first time I saw it but had forgotten about it until recently. Very simple, with an excellent result. I used a 4:1 ratio of powdered sugar to baking soda by weight for the snake mix, and isopropyl alcohol as fuel to wet the sand.