Each leaf had a fact about the period. I used this with my 5th graders. During the second semester, we did a unit on the Twentieth Century. We went through decade by decade and listened to music representative of that time. I had a large branch for the Twentieth century and small twigs for each decade.
Stars surround the shuttle.
Every day, I look in the newpaper and collect comics about music. There is usually one each day, sometimes 2 or 3. The kids love it, and some have brought me comics they have found from different sources. This helps, because the comics are black and white, except for Sunday's. I really liked was a Halloween themed board.