Thumb piano!

In Zimbabwean music, the mbira is a musical instrument consisting of a wooden board to which staggered metal keys have been attached. It is often fitted into a deze that functions as a resonator. Mbira performances are usually accompanied by hosho. The Mbira is usually classified as part of the lamellophone family of musical instruments.

Robert Patterson Collier Flickr set shows a great

deal of Thumb Pianos, or Kalimbas, or Mbiras.

Carol of the Bells (array mbira)

African Harp and Thumb Piano Ensemble

Paco Sere plays mbira

[Source] Alexander Zakharov