Music games (piano students mostly):
http://www.musictechteacher.com/musicquizzes.htm
Create your own music:
http://www.flashmusicgames.com/
More Music Games (all instruments):
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=9&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.emusictheory.com/practice.html
Viola Fingerboard practice:
http://www.emusictheory.com/practice/violaNotes.html
Violin Fingerboard practice:
http://www.emusictheory.com/practice/violinNotes.html
Music Flashcards online:
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=395&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.musicards.net/
Ear Training:
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=455&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.netrover.com/~kingskid/piano/piano.html
Music BINGO:
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=455&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.netrover.com/~kingskid/piano/piano.html
Easy to use Be a Composer:
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=455&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.netrover.com/~kingskid/piano/piano.html
Music Note Name Flashcard Game:
http://musiced.about.com/gi/o.htm?zi=1/XJ&zTi=1&sdn=musiced&cdn=education&tm=455&f=00&tt=14&bt=0&bts=0&zu=http%3A//www.netrover.com/~kingskid/piano/piano.html
Music Games (Composer Time Machine, Note name game, Compose your own music, Be a rocking rhythm master):
http://www.classicsforkids.com/games/
Games and Worksheets:
http://makingmusicfun.net/