I did this "collage" of several musical instruments some time ago for an English school book, that will be published by Klett. It illustrates an exercise, where the pupils have to write down, how these instruments are called in English.
Exept for the drums and the guitar, I never drew one of those instruments before, so I had to do deeper research to get them right. Ah, in this moment I remember, that I once made an organ of cardboard in my childhood for a cardboard church, I built for my Lego-town. I'm sorry, I never finished it.