I can‘t find the link anymore, but in the prologue of (I think) a German norm for building playgrounds it said something along these lines that resonated a lot with me: „Kids have the right to hurt themselves and test their boundaries in a safe and limited way“ That‘s just so important for kids I think. US playgrounds all look sad to no end compared to the 15 meter high rope pyramids you see here in a lot of schools.…
https://photos.app.goo.gl/e15h4rK2NPQvUzH37
Of course I had to climb it immediately. My son was only 2 at the time so he didn't make it far. He's old enough now that I really want to find another one.
I found a few similar items in other parts of Oregon, but I haven't found one in California yet.