Well the whole bloody point is that you can learn to "play" the bones, spoons or bodhran in half an hour, then go along and pee everybody else off. You can't learn to play a fiddle, a harmonica, the flute or the pipes in half an hour, and you can't build a repertoire of tunes in half an hour either. Practically all the drop-in bones/drum/spoons players I've experienced not only don't know the tunes they're purporting to "accompany" but also don't know one rhythm from another to save their lives. In the traditional dance music of these fair isles, the tune contains all the rhythm and drive already, and an extra layer of rattling/clattering/banging is both superfluous and annoying. That stuff has its place in bands with their arrangements, but not in sessions (in my opinion). The average bodhran owner, to borrow a phrase from a mate of mine, sounds like a couple of spuds in a bucket, and bones players sound like Pinocchio having a w**k.