thumb piano

US /ˈθʌm ˌpiˈæn.oʊ/
UK /ˈθʌm ˌpiˈæn.oʊ/
"thumb piano" picture
1.

a musical instrument of African origin, consisting of a wooden board or resonator with a series of staggered metal tines that are played by plucking with the thumbs

:
She learned to play the thumb piano, producing soothing melodies.
The sound of the thumb piano is often described as ethereal and calming.