http://www.dataflo.net/~mpurintun/KidsSongs.htm
huge list of classic kids and contemporary songs w/ midi, tab, lyrics

http://www.leeds.ac.uk/music/Info/RRTuneBk/tunebook.html
Richard Robinson's Tunebook: This is a collection of traditional tunes, and new tunes in traditional styles - Scots tunes, Irish tunes, Scandinavian, English, French, Balkan and more.

http://www.kididdles.com/mouseum/index.html
has huge free listings of classic song lyrics, some with music

http://dragon.sleepdeprived.ca/songbook/songbook_index.htm
very impressive collection of trad song lyrics/campfire songs

http://www.niehs.nih.gov/kids/musicchild.htm
gov site with lots of classics w/ midi
http://www.niehs.nih.gov/kids/nametune1.htm
Same site, but this is a kid's song game - name the tune

http://www.manythings.org/midi/
Charles Kelly's Links to Sites with Standard MIDI Files on the Web

http://www.soundpiper.com/mln/midi.htm
huge list of sites with MIDI and digital audio

http://www.musiclegacy.com/
The home of John-patrick Yeiser, host of "Porch Party," containing multi-cultural folk music education for children. MIDI

http://www.laurasmidiheaven.com/Kids.shtml
lots of midi classics

http://www.veeceet.com/kidzsing/index.html
midi classics

http://pbskids.org/rogers/songlist/
Mr. Roger's song lyrics, music

http://www.geocities.com/Broadway/Stage/7840/select.htm
120 Disney songs, lyrics and midi

http://www.barbneal.com/wav.asp
classic tv themes as wav files

http://www.danmansmusic.com/childrens/
A huge collection, text only

http://xenia.media.mit.edu/~kristin/songbook/ClassicKids.html
classic lyrics w/ pdf

http://judyanddavid.com/Songbook/Songbookcover.html
classics lyrics

http://www.worldkids.net/entertainment/music/lyrics/kidsongs/lyrics.htm
classic lyrics

http://www.esl-lounge.com/children-songs.shtml
lyrics to classic and modern

http://www.bussongs.com/index.php
lyrics to bus songs

http://www.geocities.com/Heartland/Acres/9058/gs/sig/rounds.html#cg
rounds and multipart, lyrics only

songs of the world:

http://www.mamalisa.com/world/
lyrics and music

http://www.gigglepotz.com/f_songs.htm
aussie and american songs, midi

http://www.geocities.com/ico_sg/indicedecanciones.html
spanish midi

http://www.night.net/christmas/songs12.html-ssi
christmas songs w/ midi