For someone who “would just LOVE to play a harmonacle!” you might suggest that they spend some time with Harmonica Lessons.com, a site with lots of information, advice and a set of planned lessons to help learn. They have information on what harps are best to use and which are best to avoid. They also have a Terms and Definitions page that includes information on selecting harps of the right key, depending on which “position” you'll be using. PoppaGator’s good advice assumes the commonly used 2nd position but there are others.

      - Mark