OK, maybe I did come off a little to harsh. For that I apologise.Maybe you could do Brother John? It sounds beautiful when sung in harmony.
Group one starts singing,
are you sleeping, are you sleeping, Brother John, Brother John.
Morning bells are ringing, morning bells are ringing, ding dang dong, ding dang dong.
when the first group has finished singing
are you sleeping, are you sleeping
the second group can start from the beginning. Once the second group has finshed singing
are you sleeping, are you sleeping
the third group can start singing the song from the beginning, and so on.
I hope that helps, and forgive me for being rude.