Expanded activities highlight the 3rd annual Mushroom Drop and Midnight in the Square   KENNETT SQUARE — At the stroke of midnight on New Year’s Eve, in the heart of Kennett Square, a 500 pound stainless steel mushroom glittering with thousands of lights will be lowered with a countdown to the new year. It is the finale of Midnight in the Square, Kennett Square’s family-style New Year’s...