A flip book, folioscope, thumbfilm, cine de dedo--call it whatever you wish. It's miniature, black and white, fits in the palm of your hand, and reads charmingly both from front to back and back to front. Whether you choose to watch time pass in "Revolution," a couple sashay in "Tango," a man eat his dinner in "Buen Provecho," a man mysteriously pour water in "Mateando," or Buenos Aires show her best, is up to your own flippery.