I stay close to the babies while the bigger kids play inside the designated area. I also let them play wherever they want as long as I find it safe for them and that they do not need my assistance. I choose playgrounds where I can easily see everyone and avoid the ones that have very big structures that can block my view if someone slide down in the other side. I have a decent size backyard, but still I really like going out and the kids enjoy our outings a lot, too. During summer we spend time in the backyard maybe twice a month or so.