Clean lines and solid construction distinguish the Zither Heaven thumb piano from the multitude of other varieties created around the world. To play the thumb piano (known also as the mbira or kalimba), the musician pushes down on a key with a thumb or finger. When the key is released, the vibration resonates in the wooden body. Anyone who picks up one of these instruments can make a great sound right away. A thumb piano is sturdy and easy to carry, making it the perfect choice for the smallest of children.