A.H.
How about Peter Pan. Using green sweat pants instead of tights. You could then just cut the bottom of a sweatshirt to make the top as well. Then make spats to cover his shoes. SO you could make the whole thing out of 2 sweatshirts and the pants.
I always start shopping for costumes early. I hit the resale stores and get flower girl dresses for about 8.00.
Happy Haunting, A. H