The trumpet is a brass instrument commonly used in classical and jazz ensembles. Sound is produced by vibrating the lips in a mouthpiece, which starts a standing wave in the air column of the instrument. Since the late 15th century, trumpets have primarily been constructed of brass tubing, usually bent twice into a rounded rectangular shape.
You could probably collect enough Metal Earth spacecraft to make a timeline of our progress. It's pretty neat to see how far we've come, and imagine how much farther we have to go.