Just so you know, in case you were curious, here are this year's Halloween costumes:
The Girl went as a vampire. I'm not sure why. She doesn't really know what a vampire is (and when I started to tell her, she got kind of freaked out), but she went as one none-the-less. At the last minute, she amended her description to say that she was a "vampire pop-star."
The Boy deviated from his recent pattern of professional scientist costumes (e.g., last year's geologist costume and the naturalist costume from the year before that), and went with "vampire sea monkey." He made his sea monkey costume himself out of poster board and string, and he was quite disappointed that no one asked what he was. (I think they thought the sea monkey elements were skeletal elements.)
But fun was had by all.