Agree with ultramarina that composing is a neat facet or musical ability. The creativity is so fun to watch, and it is totally different from the other writing /art that DD enjoys. She is able to write for multiple parts and seems to innately understand the theory and structure well-enough to produce some decent sounding music (having access to really cool computer software that enables this is definitely a plus). We feel lucky our school offers a music theory sequence in high school if she is still interested.