K.M.
Brave, Riley! I'd be worried what KIND of creativity it would breed--will they color on the walls, try to give the dog a haircut--? lol!
M., is your city offering anything special? We have a downtown area where they've set up an ice skating rink and (I think) a snow machine. Also the local botanical gardens had free admission for a while...sometimes local businesses will do stuff like that around the holidays. You might also check out what's on the schedule at your local libraries. Or what about a boys and girls club?