This is exactly why I keep a rotating supply of lego's on my desk at work. These bricks would certainly be a welcome addition to that rotation.
I really wanted this mini-quadro style kit[0] when I was a kid, more than the larger actual climbing frames they sold.
I'm now making a mental note to re-assess Knnex or whatever it's called. I have thought of getting a big lego kit for us to build together, like one of the Technics cranes.