Great site to explore musical instruments and composers!Incredibox.com
Music creating for a kid in this day and age!!This is my FAVORITE fun music creating website!Classics for Kids!
Composers, Compose, Create, Learn!Chrome Music Lab
Google has everything-including fun music creating apps!San Francisco Symphony Kids
San Francisco Symphony Kids offers lots of fun music games!Sphinx Kids!
Yet another website with a wide variety of activities to try and learn from!PBS Kids Music Games
Great music games for the young and young at heart!!