We spent Halloween at my sister's house this year. Every year, most of the houses on the block she lives on decorate their garages as one of the locations in the Harry Potter books. The crowd that comes is by now completely insane. You can barely move through the street (which is blocked off). Whenever we go there for Halloween, we help to pass out candy as the crowds move through their garage.

My son, who is almost seven, wanted to help pass out candy. While my interaction was limited to...