I had problems with the children wanting to run constantly in the house so this summer I turned the garage into a 'gross motor' room. I'm in a bit of a unique situation that allowed me this freedom (no hubbie/kids!). I put cushioned mats down on the floor and a small trampoline, a small slide, a tent, some large cardboard 'bricks', some large trucks, a sand table and painted a huge magnetic chalkboard on the wall and put a gate across the exit to the driveway and propped open the door to the house... The kids loved it! and instead of telling them they couldn't run/jump in the house I could tell them to go to the garage if they had excess energy. We spent the majority of the summer outside! I realize not many people can go to this extreme but I thought it might give you some ideas on how to adapt the space you have. The other thing I did was change the indoor layout so they couldn't run because of furniture layout while still giving them adequate floor space to play.