Is children playground safe for children?

These days I bring my son to play ground I find that not many children are not to play these days. Usually they are many children come to play ground to play by themselves. They are not many guardian or maid that follow the children. Even if the children with maid but maid will be seating with other maid to chat. We need to keep our eyes on the children, I find the play ground with some strangers sometimes. The play ground in the neighbourhood do not have guards to block the entrance because too many exits in the housing area. So anyone can just go to the play ground. Do you bring your children to play ground? I always keep my eyes on my son even though I have to chat with neighbour for update on neighborhood.