My husband used to dream up Halloween costumes for the kids.
One year our son was a rotten cabbage in a garbage can, complete with smells and a lid. To give him the candy, you had to throw it in the trash.
My twin girls went out as a monster. We made paper mach-et eye balls (full head helmets) with black nylons for pupils so the girls could see out. We made a dragon like paper mach-et mouth which mounted off their front. They wore a double wide body suit and each had one arm sticking out to the side as tentacles and the 2 arms close to each other exited through the mouth to make a split tongue. People fed the monster its candy. The neat thing about it was that the eyeballs moved separately according to what each girl was looking at. It was a real show stopper but a bust for the girls as it was very difficult to navigate porches and doors when trick or treating. A few fights broke out so it was a mean monster as well.