M.J.
Are you in a neighborhood or are the homes spread out? If you're in a neighborhood, maybe a scavenger hunt? I'd give a list of 13 items and send two teams off in different directions and first team to collect those 13 items from neighbors wins. List can have things like "A quarter with a state on it," "a green rubber band," etc. Items that aren't necessarily easy but that someone is likely to have.
Also, maybe do some games like they do on Minute to Win It?