There's P.D.Q. Bach's "Art of the Ground Round". I'm thinking particularly of "Loving Is As Easy".

Also a round I learned at a folk-dance party:

What a queer bird the frog are
When he sit he stand almost
When he walk he fly almost
When he sing he cry almost
And he ain't got no sense hardly
He ain't got no tail hardly
EITHER! He sit on what he ain't got hardly...

Cheers!