Last year when we went to visit Santa the girls were A. Not real familiar with the concept and B. scared shitless.
This year, to prepare for Santa's lap again, we did a lot of prep work. Len, Nana and I all took turns being Santa at home so the girls could role-play walking up to Santa, telling him their names and then answering questions about what they want, how old they are, etc.
They were beyond excited to get all dressed up and head to Macy's on State Street to see Santa. The new coats were an early Christmas present from Nana!