Archaeologists trace the earliest clay containers to the Stone Age when people used crude stone tools to make clay pots for cooking and storage. Today’s potters use special types of clay and sophisticated techniques to produce fine craft ceramics. Once crafted mostly by artists, pottery is now one of the hottest hobbies in the country. Ceramics classes are full to bursting, some kilns are running 24 hours a day and the British show, “The Great Pottery Throwdown” has millions of rabid fans. What kicked off this ceramics craze that shows no signs of slowing down?