Swedish FireSteel.
THIS.
Also, do this:
1. Get an old headset like
this, cut off the bendy mic wire thing, and pull out the mic (so it leaves an empty socket).
2. Attach this to a front of a Super Soaker and bend it upwards, so it's in front of where water comes out.
3. Cut about 3/4 of a match off, so you have the very end. Put this into the empty socket of the mic.
4. Fill the Super Soaker with car washing fluid (I've found that car washing fluid works really well for an aimed flame).
5. Light the match.
6. Squeeze the trigger.
7. ???
8. Profit. And perhaps a burnt down house.