Looks like a project that an old electronics hobbyist like me might enjoy, but probably not something for everyone. Excerpt:
Looking for a weekend project, or haven't found a music player that'll satisfy your inner creative geek? Well, meet MAKE's Daisy MP3 Player Kit, an open-source setup that'll play MP3 and WAV files all from one little chip board. Of course, this is a kit, not a full-fledged player, meaning Daisy comes in parts -- you'll have to give it a power source and a case should you want to actually use it in the real world. You can buy whole kit (the caboodle is extra) from MAKE or direct from its Oakland-based creator for $115
And here's a picture of what you'll be buyingbuilding.