I've got two words for you: bubble organ. Yeah. Pretty awesome, right? And apart from just sounding cool, this thing is real. An arguably "musical" instrument, the bubble organ was built by Aaron Wendel as an attempt to explore the sounds of bubbling inside of tubes and how this sound could be control ed for the purposes of musical composition. Built from pieces of old furniture, wood and rain collected from the alleys and dumpsters around his apartment, Aron's bubble organ is truly a 100% recycled machine- but that's not all!
Beginning with two balloons attached to either end of a pipe that runs below the keyboard, the bubble organ is controlled by small plastic tubes that attach to this pipe, running through the keys that were created out of clothespins and Popsicle sticks. These keys pinch down on a piece of heat shrink tubing, essentially controlling the flow of each tube. The tubes running from the keys lead to a pool of water at the bottom of the box. On top of the plastic tube system inside the box rest PVC pipes covered by gutters, cut to resonate a specific pitch. When depressed, the air flow is allowed to move from the balloons through the tubes, bubbling inside the PVC pipe corresponding to the keys played.
Supercool instrument, right? Reminds me of Cage's Water Walk, where musicians blew air into water through straws to get that bubbling noise -only this bubble organ is admittedly much more elaborate. And probably more fun.