When James Theophane Jr. was asked by his employer Lost Boys, an interactive marketing firm in the UK, to come up with a Christmas card, he thought of the 50 or so mobile phones discarded after the agency went through a company-wide upgrade.

That inspired the constructions of a gigantic mobile, with each phone programmed by computer to sound a single tone that together formed a choral arrangement. The interactive sculpture hoisted at the entrance of the Brick Lane studio can be enjoyed by anyone visiting the live stream and tapping out his/her own jingle on the onscreen keyboard.