To play the thumb piano (kalimba), the musician pushes down on a key with a thumb. When the key is released, the vibration resonates in the wooden body. A thumb piano is sturdy and easy to carry, making it an easy choice for children. The 12-note thumb piano forms a diatonic scale (middle C to G, no sharps or flats). Made in the U.S.A. from sustainable native North American solid cherry, maple, or black walnut.