I have one of the old ones. The head is actually a music-box style mechanical movement, with each "track" of the record corresponding to a particular tone. A st

I have one of the old ones. The head is actually a music-box style mechanical movement, with each "track" of the record corresponding to a particular tone. A standard music box has the notes of each tone embossed on a cylinder, or has pins installed at the location of the notes. As the cylinder rotates, the lands (that is, the raise part) of the embossing hits or plucks the strings/wires of the musical part. With the fisher-price toy, instead of a cylinder, its a disk. I've been meaning to figure out how to spec out an appropriate torsion spring to replace the one in mine, as all of the songs sound a bit slow these days. I'd also love to write a program to convert some songs from midi into a 3d-printable file to make my own records for it. I had no idea its from 1978, although that tracks with how old my siblings would've been when they got it.