I can't say that I'm an expert in that field. We have installed a nature playground at the Living Prairie Museum, and there's one at Assiniboine Park as well. I know from my experience with my own children that it seems like a simpler design, but they can spend just as much time, if not more, playing in the nature playground than they do on the more designed structures.
On October 29th, 2012. See this statement in context.