Some of my high school kids are trick or treating in my town tonight (And did in their town last night). How old is too old for trick or treating? I think I stopped in 8th or 9th grade. I don't really care as long as they have a costume on. If they are willing to dress up and put effort into it, I don't mind giving candy. On the other hand, if an older kid walks up with no costume and no attempt at all, they are probably getting like 1 dum dum, as opposed to the generous handful I usually give. lol.