Music Lab Built-in Tracks

My 4th grade students have completed CS Fundamentals -E. For the last couple of classes this quarter I was going to have them try MusicLab. It is a great learning tool, however the built in tracks are pretty much the worst music I have ever sampled and totally inappropriate for school in general and 4th graders in particular. The only exception is Beethovens 9th and Twinkle Twinkle Little Star. I am dismayed there is not a tool to load music tracks. Are there plans to have this capability in the future?