Instructions Full Game: These are multiple-choice quizzes with four possible answer choices that include all questions in a given set.     
Identify the following instrument:
Also known as clackers or palillos, a percussion instrument (idiophone) that consists of a pair of concave shells joined on one edge by a string, held in the hand and used to produce clicks for rhythmic accents.
Violin
Saxophone
Castanets
Accordion