S1, E22: Nine-year-old Woosung lives in Seoul, in South Korea. To get around, he uses his scooter for short distances, and the subway (one of the cleanest, most popular of its kind in the world) or the bus for longer journeys. His parents have a small, nippy car, for zipping in and out of the thick traffic of the capital. Today, he and his aunt are going to the zoo.