I've had a lot of fleeting ideas to use as a premise for my Digital Cel Animation project, including a music video for the song "I Think I Smell a Rat" by the White Stripes. There are one or two ideas that I'm undecided on.
One of the better developed ones is a story about a little girl playing with her mother's bathroom things, playing dress-up and trying on jewelry. She accidentally drops a ring down the sink and the only way to get it out is to employ her pet hamster/gerbil/mouse, who dons an explorer hat and gets lowered down into the drain by a rope. Then he has a brief adventure, probably fighting a cockroach or something, retrieves the ring, and brings it back to the little girl.
I had other ideas, too, but this one seemed most straightforward. It's probably way too ambitious, however, and I'm trying to find a more simple premise to work with.