Unfold Your City

A shelf of pop-up books, one for each of the world's great cities. Open a book and the city rises out of the page: towers stand up, bridges reach across the river, palace roofs lift into the sky, folded the way real paper pop-ups fold. Lie it flat and the day turns to dusk, the windows light up one by one, a music box plays, and the city comes alive: Big Ben chimes, Tower Bridge lifts for a tall ship, lanterns glow in Seoul, the sun sets behind Barcelona. MADE FOR IPHONE DUO On iPhone Duo, the phone is the book. Closed, its outer screen shows the cover. Unfold the phone and the book opens with it: slowly, and every card stands up exactly as paper would; snap it open, and the whole city springs up. On any other iPhone, a hinge at the bottom of the screen opens the book. FOUR CITIES TO START • Barcelona: the Sagrada Família, Casa Batlló and Park Güell. Free. • London: Westminster and Big…