The Zimbelstern (meaning "cymbal star" in German, and also spelled Cymbelstern, Zymbelstern, or Cimbalstern) is a "toy" organ stop consisting of a metal or wooden star or wheel on which several small bells are mounted.
When engaged, the star rotates, producing a continuous tinkling sound.
The device is probably most effective as a foil to light Baroque counterpoint of an upbeat nature, or hymns registered using a bright principal chorus.
In some Christian liturgical traditions, it is rung during the singing of the Sanctus or on doxological stanzas of hymns.
This article relating to free reed aerophones is a stub.