There is a superp piece of port a buel entitled Tail Toddle (with a marvelous story concerning Hamish Henderson and an American visitor to Edinburgh - unfortunately it is visual rather than verbal).
Anyway, one of the voice exercises we used for breath control in the Critics Group was to sing 2 choruses and 1 verse of 'Tail Toddle' in one breath.
Good fun, and does the job superbly
Jim Carroll