She thanked him for coming on the Holiday Train ride, and sitting with her to talk about what she wanted for Christmas - a jewelry box and a unicorn doll. Then we sealed it up, addressed it to the North Pole, and took it to the Post Office so she could buy a stamp & mail it off all by herself.
About a week later, we woke up one morning and Buddy was at the top of our Christmas tree holding a BIG, beautifully decorated envelope, which had a fancy reply letter from Santa himself (with a little help from moi!). She was sooo happy to get such a personalized letter from him!
I definitely plan to make this an annual tradition with K from now on ;-)