Science of Music - This site is part of exploratorium.edu. It has some really great real life information about how music and sound works. It also has some interactive exhibits that are a lot of fun to play.

San Francisco Symphony Kids Site - This site has great basic information about symphony instruments and an awesome music lab that lets you explore rhythm, pitch and more.

Creating Music - a web site has many games, including games where you compose and play music.

KIDiddles Musical Museum - This site contains the lyrics to your favorite children's songs.

PlayMusic.org - A great site for information about the different types of music in an orchestra.

Carnegie Hall - Has information about orchestra instruments, as well as an online game that you can play with or without a log in

Arts Alive - Lots of great information as well as some games

Music with Glasses - A nice, easy interactive way to virtually play water glasses with a spoon.