Look in bookstores for the Wee Sing series! The songs are great! I'm not a huge fan of the recordings, but they're not THAT bad and they'll give you an idea what the songs sound like if they're new to you and if you don't read music.
Also, I don't know if your library would have them, but ours have the Music Together CD's (and cassettes - they don't make cassettes any more) available for loan, and they are WONDERFUL!!!!