Nothing.

Well, not really nothing--I am several years past being of an age where that would be anything but disgusting--just no costume. I had on khakis and a sweater. Then, we turned out the lights and went out sinces there are few children in our neighborhood.

My grandchildren were all adorable, though. One American Girl of some stripe, one Iron Man, one teddy bear, and a cow! The cow is only a month old, so he was not really into it, but the teddy bear was adorable.