As one of the kids who grew up in relatively unrestricted playing environment (read: no purpose-built playgrounds, the whole city/town/village was our playgroun

As one of the kids who grew up in relatively unrestricted playing environment (read: no purpose-built playgrounds, the whole city/town/village was our playground) I am wondering how today's kids manage to develop any skill in the physical world, since parents are constantly around and the kids are super-dependent on the supervision and restrictions.