Ahhhhh. Minimalist is near and dear to my cheapskate heart!
If you lived nearby, I could provide a BUNCH of firecrackers. (S.W. Virginia)
Bottle rockets (the SMALL ones) I can no longer get in S.C., but next time I'm through Indianna I'll stock up. They seem to be ideal candidates for this application.
Is that copper tubing with a port to light the bottle rocket?