The 1971 Fisher Price Change-A-Record Music Box is a classic children’s toy that comprises plastic ‘records’ and a mechanical music box in the ‘needle’ arm. The bumps in the disc pluck the tines of the music box, producing the sounds you hear.
But the toy only comes with a few discs—what if you wanted to change it up? You’ve got two options: mill out a plastic disc, or 3D print one. Unless you happen to have a milling machine handy, the 3D printed option is a lot easier. You don’t need your own 3D printer if you don’t have one, because you can always send out for a print from Shapeways or similar. Plus, the software’s all free!
A print like the above from Shapeways will cost about $30, and the author of the Instructables already has several discs on Shapeways’ site.
Now as for the record player, there are a good number of the classic toys available on eBay for $20 and up. Fisher Price did ‘re-release’ the toy, but with a huge difference—it’s all electronic instead of mechanical. It just detects the disc and plays back a prerecorded electronic track. Super, super lame.
Anyhow, get to it—and if you make any of your own discs, leave a link!