[JustVisiting_]

> if the playground is safe, and thus boring, they will just climb surrounding trees and fall down from them

S'funny you say that. Years ago I went to a photography exhibition showing photos taken by a bunch of hippies.

One photograph showed kids playing on a climbing frame. The caption underneath read: "Children Playing on a Tree Made of Metal".

A rather fitting comment on industrialisation and urbanisation if ever there was one.