I find this a hard one especially as my two are so different! DS nearly 4 will bound all over parks ect with wild abandon and is difficult to reign in. He has spent a lot of time in soft play centres where he is used to lots of freedom so struggles with boundaries in parks, walks, beer gardens etc. DD is nearly 2 and would happily sit in my shadow if I didn't urge her to play. I see some parents in parks set up camp and let 4 and 5 year old run off but Im worried about DS and although its rare what about abduction? We've talked to him about strangers but surely he's too young to get it? My best friend lets her DS (same age) play in the garden whilst she's upstairs drying her hair and things. I will do jobs in the kitchen where he's in sight but won't stray too far from the window. How do you do it?