My roommate, who generally opposes things associated with children, sings this song every now and then from his childhood:
Some sailors went to sea sea sea
To see what they could see see see
But all that they could see see see
Was the bottom of the deep blue sea sea sea!
Now, I've poked around the *internets* (ha) to find this and several variations popped up. Rather than borrowing those versions, though, I'm going to make up my own way of singing this... which is that the word "see / sea" is to be replaced by a nonsense word selected by an audience member - at first cycling through a couple choice staff and then chancing it on a brave child.