Me and my son have recently moved to a new house, theres loads of children in the street but they are all a couple of years older than him. but whenever he sees them outside he runs out the house to go and play wit them no matter what the time is. he mostly plays out side my house,which is fine because i can see him but sometimes he goes further and i cant see him, and although i know the area very well and i know its safe im just scared something happens and i cant find him. And because im a single parent i often find myself having to get my neighbor through to sit in my house while i go out looking for him in case he comes home and the house is empty. is this normal for 4 year olds to do this?