There is now a 3D printable retro-style case available for the project. For people with dementia, the strongest memories are often of their youth. So I had wanted a case that follows the "cathedral" style of that era. Thanks for new volunteer Trey Bagley for the wonderful 3D design. Shown below is a 3D print with wood PLA then stained with regular wood stain. The components on the inside haven't changed - it's still an easy no-solder project.
You can still laser cut a case, see below. This design has worked very well for people with dementia.
If you don't have a 3D printer or a laser cutter, no worries. You can order the laser cut case parts for ~$29 from an online laser shop (see the build instructions).
For more information, including plans and build instructions, see http://dqmusicbox.org.