I so wish he was old enough to explain his choices to me. I'm thinking something like this: The football is a mountain backdrop. There was some construction going on around the manger, so of course there has to be a tow-truck. Joseph went out to get ice chips for Mary during labor in the red sports car. The puzzle piece is a bird flying through the air, and the block is the guest house where the wise men stay. The plastic orange donut thing represents a hot tub for everyone to chill in after their long journeys, and the angel and Joseph are guarding the "Baba" Jesus (who is always in the manger---the kid is a genius, don't you think?). All of the animals and the shepherd have to go in the basket below the scene because it's too cold to be outside, and Mary is hanging out behind the guest house cleaning herself off after labor. She's also probably gaining her composure, seeing as she just gave birth to the Son of God and all.
Merry Christmas!
