The 'nunun is a Catalan wind instrument made from straw, with a tallet at one end which is taken between the lips and blown, producing a sweet tone. This tone is described by its onomatopoeic name.
The nunun was traditionally made in the fields by children at harvest-time; they would take wheat straw and carefully cut it to make small noisemakers known as nunun. The children knew how to cut the straws to produce a variety of tones, and would combine several nunun of different lengths to produce different notes.
Costumari Català: Auques, instruments musicals i Nadal. Salvat Editores, S.A., Barcelona, 1997., plana 140.