I got this lesson from School Arts a few years back. Its called Hot and Cold Jazz. I start with using real instruments borrowed from the music teacher and lots of photo copies of different musical instruments. We sketch and plan three different plans using about four or more instruments. One of the instruments has to break the picture plane. Most students choose a guitar or piano keys to do this. We aim to paint one side HOT (color theory lesson) and one side COOL although as you can see, I allow for experimentation. When they are finished the students apply a glitter paint to the entire surface. Okay, I'll say it again...a favorite!