I also have a three string, unfancy, hand made dulcimer, that has quite a lovely wood. I haven't played it in a while alas,but am glad to be reminded to take it off the shelf. And I would happily take suggestions as to some simple tunes to play. I will be playing a set at an historical restoration village soon, so I would want songs that recall life from a prior century.

Besides Simple Gifts, which I can still remember. ;)