Kootoyoo music boxes are constructed by hand in my Melbourne home.

They come as a traditional windup version which play a variety of classic "music box" tunes or as an MP3 ready version.  The speaker is hidden beneath the "floor" of the keepsake box.

 You can see the MP3 version in action here:

I love the idea of recording your own voice either reading a story or a letter written especially for your child: