I go to the park a couple times a week, usually with 5 dck and my own 22 month old. Kids 3+ know the rules and need to stay in eye sight all the times. The little ones usually stay by my side, and I bring lots of sand toys that usually occupy their time. The more you go, the better they will become. The kids know if they aren't listening and behaving, we pack up and leave. I usually like to go early before it gets really busy and leave before lunch. I have a big backyard with swingset but I like to practise outings with the kids. They wont learn if you keep them at home all the time. We always go over the rules before we leave so the kids know from the beginning what the expectations are.