Music

Fun with Music-http://www.sfskids.org/templates/splash.asp
Music basics plus the instruments of an orchestra.

Music Room http://www.empire.k12.ca.us/capistrano/Mike/capmusic/music_room/themusic.htm
Music styles and periods and you can listen to the instruments.

Instrument Encyclopedia-http://www.si.umich.edu/chico/instrument/
Search instuments by type or by country.

New York Philharmonic Kid Zone-http://www.nyphilkids.org/main.phtml
Music games, composing, and an introduction to the instuments.