Answer:
Here are some ideas! (explanation)
Step-by-step explanation:
Write a Christmas list! What do you want?
What are your questions for Santa?
If you are a Santa denier, what are your doubts?
For a potentially funnier angle, make demands of Santa- prove yourself or the elf on the shelf gets it or something.
Write him a love letter.
I hope that any of those ideas are enough to get you started!