Just thinking tonight: what would a sentient being made of fireworks be like? (I imagine it looking much like a Chinese lung, for some reason.) Would its life cycle be all of 10 to 30 seconds long, like an actual Class B firework, or would it be able to sustain itself for much longer periods of time? And what would its temperament be like -- maybe purring like banked coals when content, but prone to occasional outbursts of snap-crackle-pop irritation? Or would it literally explode when overstressed or furious?
Hmm. Such a creature might be handy at campouts. Especially if you're of the school of s'more creation which holds that if your marshmallow doesn't at least briefly become a Flaming Beacon o' Justice, you're doing it wrong.
I should really go to bed now.