Children need no constructed playgrounds!
Nature such as the forest, the Park, the Meadow offers the most self-organised, free and creative play for children.
They need no constructed playgrounds with limited usability! Children want to be effective, they want make their environment itself, participate actively, self learn and where they can do that better than in unstructured realm of experience as nature.
So out with the kids, so that they give free rein to their creativity and effectiveness can!