By Rob Alway, Editor-in-Chief LUDINGTON — Kristin Korendyke has announced that she will retire as executive director of Sandcastles Children’s Museum at the end of the year. Korendyke was one of the founders of the museum. “My career at Sandcastles has gone along with the life of my youngest child, Halle,” Korendyke said. “I was pregnant with her when Sandcastles…