As a little child, I had a “programmable” xylophone which was driven by a big cylinder with slidable pins. Unfortunately, I was very careless at that time and so the poor thing broke shortly after I got it. But, the concept of (programmable) music boxes was born in my mind and I always had fascination for the mechanism inside a toy music box.
I looked on the internet to see if something like that still was available, but didn’t find anything but programmable music boxes using a paper strip. Being a blind person, punching holes in a paper strip wasn’t really an option; so I was wondering if there was some other kind of programmable music box and all of a sudden, I discovered something called, ”Muro Box”…