Balloon organ
Fran Holland's "Balloon Organ" uses a bunch of standard plumbing fittings, tuned with sliders and balloons to produce weird, eerie, bagpipe-style music. A large inflated balloon to one side provides the steady air pressure for the drone. Link (Thanks, Nirvan!)
Where not otherwise specified, this work is licensed under a Creative Commons License permitting non-commercial sharing with attribution. Boing Boing is a trademark of Happy Mutants LLC in the United States and other countries.