A Round is a single melody line that when staggered at predetermined intervals, accompanies itself, just like row row your boat. This one is pretty brilliant.
What a queer bird the frog are:
When he sit he stand (almost);
When he walk he fly (almost);
When he talk he cry (almost);
He ain't got no sense (hardly);
He ain't got no tail, either (hardly);
He sit on what he ain't got (hardly).
Bonus: Two girls attempt this difficult round.http://www.youtube.com/watch?v=SsOZOWf1vtA