Looking for nursery rhymes

[estepheia]

I used to have several sites for nursery rhymes bookmarked (for use when writing Dru), but right now I have no time to go through them to find what I need (They are organized by title, but the titles don't mean anything to me). Maybe you guys could help me? I am looking for a rhyme about animals, preferably farm animals, that is both short and easy to pronounce. I want to teach it to three six-year-old girls who are learning English. Or if there's nothing about animals, maybe plants or sun and moon could work too.
Thanks.