one of the kids I saw while walking around on halloween had a robot costume consisting of just regular clothes and a cardboard box on his head that had a robot face (just like
this one, actually) drawn on in marker. i thought that was pretty good. it reminded me of making a "toxic waste" costume as a kid by crouching under a cardboard box with green gunk drawn on the top and generic robot stuff scribbled on the sides.
anyway no kids knocked at our house this year. Well, Thats My Halloween Story