Dulcimer maker unknown
Instruments- discuss specific features, luthiers, instrument problems & questions
Cardboard dulcimers have been around close to 20 years, I'd guess. They sound remarkably good and are a great inexpensive choice as an entry level dulcimer for folks who aren't sure whether the dulcimer is right for them... The important thing is that the frets are set true, the body material is of secondary consideration. In fact the fretboards can be easily transferred to an 'after-market' wooden body which almost anyone can easily construct. I've played plexiglass and Lego(tm) dulcimers that sound good as well.