Games

http://listeningadventures.carnegiehall.org/nws/splash.html

Learn the Sounds of the Orchestra:
http://listeningadventures.carnegiehall.org/ypgto/index.aspx

Matching Instruments and Sounds:
http://disneyjunior.com/orchestra-ocean-treasure-hunt

Listen to Music (and save animals at the same time):
http://disneyjunior.com/moon-rock-mix-up

Listen to Music (and fly your rocket ship):
http://disneyjunior.com/the-great-sky-race

Learn about Composers, and Much More:
http://disneyjunior.com/mission-to-learn

Silly Song Machine:
http://disneyjunior.com/silly-song-machine

Echo Time:
http://disneyjunior.com/echo-time-with-annie

Play Music with the Barnyard Animals:
http://disneyjunior.com/leos-barnyard-baton

Learn about Musical Families:
http://disneyjunior.com/leo-and-the-musical-families

Magic Instruments:
http://disneyjunior.com/quincy-and-the-magic-instruments

San Francisco Symphony Kid's Site (overview of lots of musical things):
http://www.sfskids.org/templates/home.asp?pageid=1

San Francisco Symphony Kid's Site (learn about tempo, rhythm, pitch, and much more!):
http://www.sfskids.org/templates/musicLabF.asp?pageid=23

Learn More:

Musical Instruments:
http://spotlightonmusic.macmillanmh.com/n/teachers/articles/musical-instruments

Composers:
http://spotlightonmusic.macmillanmh.com/n/teachers/articles/composers-and-lyricists