An observation: Most of the kids were very little, leading me to believe that they only just recently got old enough to go trick-or-treating without Mom and Dad.
Some amazing costumes! Perhaps my favorite was a robot made of cardboard, painted green. My favorite line, when a group of pre-teens were standing in the doorway picking their treats: "Wow, I love books! It's like a library in here." I built a story-and-a-half bookcase in my living room, which you can kinda see in this photo:

Hooray: Kids love books!
Chris