Tonight, we attended Music Fest at the high school. K's band, along with four other bands from schools in the area, each played two pieces of music and then they joined together in a massed band for three more. It was entertaining and I really enjoyed it.
What I find most impressive is that these kids, along with an outside conductor (ie, not one of their regular music teachers), learned how to play these pieces of music together in a single afternoon. Plus, they played O Canada together at the end which they did not rehearse at all. Massed bands are cool.