i would like to add the didgereedoo. made with pvc pipe.if nothing else, with a drilled end cap fitted to a 2 inch schedule forty pipe. useing an inch and a quarter hole saw and sand paper to smooth the hole edges, a kid could make some rather loud fart noises. or some interesting didg sounds. so far i've been able to hold a note for five minutes. circular breathing is not so hard. i still have no idea how dr. didg does it.