A quick print Minecraft Creeper with space inside for your average firecracker.  The fuse comes out the bottom and between the back legs.

This started as a joke about the beach and sandcastle tournaments.  Obviously, I would never encourage anyone to use fireworks in an unsafe or illegal manner…

The head is deliberately a loose fit to encourage separation in certain situations and to remove concern about it still fitting when printing quick at low quality.  Expanding the X and Y on both files by 25% and leaving Z as is made a fat little Creeper with enough room for the m80 knockoffs with the top fuse.  (We can't get the good stuff I used to destroy my sister's Barbie as a kid in my state.)

After “testing” a dozen creepers, the head consistently survived… even if it was a bit hard to find.

Rafts: No

Supports: No

Resolution: 0.28

Notes: I use a sharpie on the face after print to make the features stand out.  Fast and dirty, but it's not like these are meant to last very long.