Elanin singer stone
An Elanin singer stone was a little  that emitted sounds when it was touched by a living being. It would not react with artificial lifeforms, such as Soong-type androids. It was said that it sang a different song for every person. Doctor Pulaski owned one that the Dreman  girl Sarjenka became curious about and shared its story with her. 

After her planet was saved and her memory of the encounter with the crew of the  was erased, Data gave an Elanin singer stone as a present to Sarjenka. ()

Culture