Our local authority has 4 adventure playgrounds. They are fenced and run by playworkers. They have fanastic facilites, appartus for climbing, painting activites, lots of toys, dens to play in and programme of activites for the children in the school holidays.
It is completely free and you can leave your children there to be looked after by playworkers provided they are between the ages of 6 and 12. The idea is that the children can gain in independence and get the advantages of playing out on the street without the dangers.
I think its brilliant, but a friend of mine accused me of being a bad parent. She thinks its child neglet not to stay with your child even if the child is 12 years old because the children are able to walk out the playground if they choose to.
My son loves playing with his friends and I think its better for him than watching TV. He is six years old, but a very sensible 6 year old. I am confident that I trust him not to leave the playground without me.