OC's joke, which she made up herself:
Stinkypants riding on sixteen hundred stinky skateboards!
My child is genius, yes? She thinks this joke is hilarious. It is her fallback, as well as premium, knock-knock joke.
I have to send you here to read this post about cats. Sooooo funny! And FYI, the shrimp to which she refers are her pet shrimp. They are alive, and have a lovely home in a fishbowl. They're kind of cool looking; see a previous entry on that blog for pictures.