This is how to make a good smoke bomb. DON'T FORGET TO ADD BAKING SODA! The ones at the end are from a previous mixture and I didn't have enough baking soda.

*NOTE* potassium nitrate can be found at garden shops (usually NOT in the chain-stores like Wal-Mart, etc.) as it is a fertilizer. If that fails, I find that Google can find some websites that sell potassium nitrate. (less info)