Kids playhouse in this now park like back yard of mature trees and newly installed landscaping along the perimeter of the property for beauty and privacy.
Added to 141 ideabooks Last comment "Recycle the fireplace outside?"
You could wall off a small part of the SW corner to make a simple, secret playhouse. Would look like part of the fence. Plus, then you only have to build 2 walls - the other two are already there.