Mother Goose Rhymes (and accompanying lesson materials)

http://www.mothergoose.com/

The rhymes are found listed down the left side as links.

And this site: http://alphabet-soup.net/goose/goose.html , which is a little nicer to look at but equally confusing to navigate.

This one is still prettier, but very modern, high-tech feel to the design: http://www.iyedo.com/1humpty.html