Not only an original take on the challenge but you also managed to capture the residents at home! Within the confines of basic editing, you may want to add "Curves" to your repetoire - quite often that can bring out a bit more contrast. Give it a shot on this one and see if it adds a bit more spark!
I like this concept. As most others, I chose to go the route of man made architecture. The thought never crossed my mind to go outside of the box. Great concept, wonderful capture!