World Clock for 11+ : Designed by Yeongkyu Yoo in 2012, the World Clock reinterprets the traditional functionality of a clock by creating a unique and playful interaction between the user and the design. Although the face of the World Clock may not seem out of the ordinary, its cylindrical body allows it to display 24 different time zones via a clever rolling mechanism. Independently working hands enable the clock to be quickly rolled back to any of its 24 time zones, while immediately transitioning back to the local time.