The Appalachian Mouth Bow: Easy to Make, Easy to Play!

No one knows what inspired its transformation from a hunting weapon, but the mouth bow is one of humanity's oldest and simplest instruments.

mouth bow - flexing hardwood slat
Every mouth bow begins as a flexible wooden slat or stick. If the center of your slat can be flexed 2 inches off the straight, it's sufficiently resilient.
Photo by Rick Sell