If you're looking for a fun Christmas-themed activity for the whole family, Would You Rather is a great game to play. In early sessions with clients, I often use games like Would You Rather to get to know the kiddos a little better, allow them to feel more comfortable, and to get to know me a little better as well. I usually ask for reasoning or feelings behind the choices, which allows me to connect to my clients - a strategy you can use to connect to your kids.
Enjoy!