http://www.sfskids.org/
The new SFSKids presents an updated online experience entirely different from the original SFSKids. Some of brand-new features and content throughout SFSKids include: a fun and playful series of educational modules presented as immersive environments and using animal avatars as guides; the ability to explore various linkages between composers, instruments and music compositions; the use of some game-based techniques to motivate repeated listening and engagement; gesture-controlled simulation scenarios using the mouse and keyboard to provide “hands-on” experiences of playing instrument and conducting music; interactive online tutorials to learn about music basics; the opportunity for users to compose and notate their own original music; and much more.

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.