We needed a mobile that A). didn’t need to be wound up every 5 minutes, B). didn’t play the same song on repeat until mom and dad lost their minds, C). allowed us to customize what hung from the legs, and as a bonus D). let us change what music was played.
We picked up this mobile and these Mario Bros. plushies from Amazon. This mobile version accepts MP3 files and is charged by micro-USB.
If you build one too, try out music from 8-Bit Baby.