IDIOPHONE - Instruments made of naturally sonorous material not needing additional tension to create sound, e.g. and generally: (1) STRUCK; triangle, gong, bell; (2) SHAKEN; rattle; (3) PLUCKED; Jew's harp; (4) RUBBED; glass harmonica.

A text summary of the clickable map above, meant for web-crawlers and other automatic tools:
idiophone made of naturally sonorous material
idiophone category struck
idiophone category shaken
idiophone category rubbed
idiophone category plucked
idiophone is category of Indonesian instrument(s)