Gamelan Playtime by Arlete Castelo and Melissa Mongiat draws in passers-by as they walk along Hungerford terrace on the South Bank in London. By moving their hands across a tactile surface pedestrians trigger sensors that release recordings of the Royal Festival Hall’s Gamelan set being played by school children. The sounds are made up of the Gamelan instruments, human voices and song.

(via we-make-money-not-art)