Pyromania FTW!
If you can get your hands on the ingredients, I recommend the aluminium powder/iodine experiment.

Mix together (I think it's 3 parts iodine to 1 of aluminium, by molar ratio, but it's not really critical) the two ingredients and form the mixture into a little volcano shape.

Put a couple of drops of water into the crater of your volcano, and stand well back. After a bit, the reaction starts and huge plumes of deep purple smoke are emitted. Then the aluminium catches fire and burns furiously. It's quite impressive.

It also smells quite a bit, and the purple smoke stains anything it lands on, because it's not actually smoke but sublimed iodine, which recondenses everywhere as yellow iodine solids.

I recommend doing it outside on a calm day. And not in a white fume cupboard in the lab. That would make a real mess, and end up in your having to clean up the evidence with an alcohol soaked rag for ages.

Not that I'd know anything about this, of course.
( K2k6 has a proper job these days, Tue 31 Mar 2009, 8:43, Reply)