Okay, back from shopping and I see no one has figured it out yet. It was kind of tough if you haven't dealt with these before.
It's an impeller from an aquarium filter system. I had three sitting on my kitchen window sill waiting to be cleaned up. Here's a page that shows an assortment - http://www.petmountain.com/category/...impellers.html
I guess I went from too simple (the candy in the candy dish and the frost on the window) to this. I'll try to find something in between next.
There were some interesting guesses.