Select from any of the Music links below for some fun and educational activities:
General
Classics for Kids – This has a large selection of popular children’s classics
San Francisco Orchestra Page – Good for exploring the elements of music (tempo, rhythm, pitch). Composerizer section is good fun where children can compose their own music.
New York Philharmonic – Choose a famous piece of music, select up to 6 instruments to hear it being played, then listen to it on the instrument it was intended for.