She really wasn't interested in writing to Santa. Especially when she saw the camera. She's either totally cooperative with picture-taking, or totally not cooperative, depending on her mood. Today she wasn't in the mood. She did become a bit more compliant when she learned presents were on the line.
We ultimately decided (and by we I mean I) that it'd be best for me to write her letter and she could draw some pictures so Santa really understood. It's probably a little difficult to make out in the photo below, but Charlotte's letter reads, "Dear Santa, I have been a very good girl this year. I like your reindeer very much! Rudolph with the red nose is my favorite. I hope you will bring me some fun new toys. I want a La La Loopsy, princess dolls, a cash register with money and coins and a treehouse. I would like a little reindeer too! Love, Charlotte"
She even "signed" her name herself. Now I just have to make sure it gets to Santa. :)