A town on a landfill in Paraguay uses trash to build musical instruments! I first heard of "Landfill Harmonic" through my cousin Julie's website, "Music Moves Mountains," which focuses on music therapy for autism, and just now saw it mentioned by Fr. Stephan on his blog, "Glory to God for All Things." Thank you Ms. Linsley at "Just Genesis" for leading me to Fr. Stephan's blog.
My words won't do these people justice; you simply have to see this video: "Landfill Harmonic," or a slighter longer version with more background here.