The Jaw harp (also known as a Jew’s Harp) is not a harp and has no historic association with Jewish traditions. If you’d like to know exactly what it is, you can find out here. Courtesy of Wikipedia.
If you’re interested in How to Play the Jaw Harp, here’s an excellent video, courtesy of Jack Pearson.
Here’s a performance by the Baikal Jew’s Harp Ensemble playing “Fangjen”, video courtesy of jewsharper on Youtube.
And now for a different flavor, check out the Experimental Beatbox: Ethnic. (Jew’s Harp + Beatbox) video on Youtube courtesy of Experimental Beatbox.