Crooked Timber has two posts on music of quite different genres.
First, Chris Bertram tells us about an animated version of Wagner's Ring cycle provided by the Goethe Institute. It is done in both German and English, with versions for the 7-11 year-olds and the older children. Besides the animated comic book, there is information about the operas for both the kids and for teachers. One of the commenters at Crooked Timber complains that the site doesn't talk about leitmotifs, but I'm not sure that is necessary for children.
Second, Ted Barlow offers a game. If you are in charge of a satellite radio station, what music would you program? They should be popular songs, but not to be found on regular terrestrial station rotations. Paging John Scalzi and Chad Orzel.