Clavier Bench is an interactive urban furniture which is inspired from the piano in form and function. It consist of four seats that each one plays two note of C major scale during sitting and also standing. If all of them move simultaneously, an ear-catching melody will played. Clavier Bench could increase the sense of humor and pleasure in the atmosphere of city and establish an enjoyable interaction between people. Also, the musical intelligence of citizens, specially children, will definitely level up by this musical furniture.