I spotted Chris Macdonald playing his barrel organ at Hahndorf during the Tour Down Under. As he cranks the handle, folding cards are pulled through rollers. As air passes through holes in the cards melodious tones are generated; it takes a steady hand to maintain a uniform tempo.
When I researched this instrument I found a description of it on Colin Herring's website.
The ABC Wednesday meme was initiated by Denise Nesbitt. To find out more about ABC Wednesdays and see other participants' contributions click here.