The Egg Tree is a 1950 book by Katherine Milhous that won the 1951 Caldecott Medal, based on the author's family tradition. It tells the classic tale of a Pennsylvania Dutch Easter, with its main characters being Katy and Carl. One day, near Easter, they look for Easter eggs and found eggs that their grandmother had painted on a tree. They were interested, so they ask their grandmother about the eggs. They eventually create one, and it becomes a big success the next Easter.