In preparation for Santa's imminent arrival in our living room, I showed him his scrap book with last year's photos of him with Santa. He would look at the pictures then close the book and look away, indicating he wasn't really comfortable with the big guy in the red suit.
When Santa came down the hallway into the living room, Liam clung to me. I explained, "Santa wants to hold you like he did when you were a little baby. You sit on his lap and I will take your picture, then I'll hold you." He understood, but he was not really happy, on the verge of tears, and then Santa talked, and Liam recognized his voice. He was trying to figure it all out, and ended up giving Santa high five.