Not sure why what made the difference, I'm just happy that we got a nice picture and they were happy to see Santa.
In contrast, here is what last year's picture looked like...
They were so freaked out by Santa that the only way to get a picture was to back the stroller up to Santa without them seeing him. LOL.
And, just for fun, here is their first Christmas picture with Santa.
We have had the same great Santa for all three pictures. :) L is on the left and A on the right in all of the pictures.