KID'S FUN PAGE
http://www.sfskids.org
This very animated and fun website introduces kids to the orchestra but also has sections on theory basics and composers.
http://www.nyphilkids.org
Great graphics and fun games—like the clarinet scavenger hunt—make this New York Philharmonic website great, especially for instrumental students.
http://www.kidsdomain.com
Two dozen different musical activities are offered on this site. There are games for pianists, violinists, Beethoven enthusiasts, composers and much more!
http://www.kids-space.org
This site offers performances and compositions by and for kids from all over the world. It requires Quicktime 3.0, which you can install free from the website if needed.
http://www.pbskids.org/charliehorse/kids/games/index.htm
For the younger set, this site, based on a popular PBS show, offers games on theory and instruments.