I dunno about telephone wires and fences, but we have this guy in Oz - Linsey Pollak. He is amazingly talented and makes instruments - particularly wind instruments out of all sorts of common household objects - such as the Watering Can Clarinet, the Carrot-flute, the Garden Hose Panpipes, the Chair-flute, and the Rubber Glove Bagpipes.

His website is well worth looking at (and listening to). These instruments are not just a gimmick. If you listen to samples of some of them here they sound quite beautiful!