A cardboard guitar, but can we make it permaculture-core?

Saw this and immediately, i thought "how cool is that!  Upcycling cardboard into a guitar.  It surehas a lot of glue.  I wonder what a more permaculture version of this would look like?"

What do you think?  Cardboard can be strong enough to upcycle into furniture and even housing,   could it become a guitar?  Or possibly a working one?  Can a cardboard guitar be compatible with permaculture-core?

Unfortunately that guitar seems to be non-functional — the tuning pegs don’t turn as they are glued in place, for one.  I am also doubtful it is structurally sound for the tension that a working guitar requires.  

In this video she claims it works as a banjo—I haven’t seen the entire thing but might be interesting to see. They use a lot of wheatpaste as glue.



I also think another promising material is pine bark or other tree barks—easily worked when wet, but sturdy and solid when dry, and with a good sound to them.  

Nifty

I wonder if these castle building techniques might work