I may have mentioned in past posts that I've dubbed our daughter Makenzie "Sitting Bull" because she has a stone face when she makes up her mind that she is not going to have fun. This pretty much happens when we go to any event or even when relatives come visit at the house.
The one person who can chip away at that stone exterior is Daddy. No matter how much she resists, he will make her smile. Then just like magic, she is more relaxed and willing to take part in the fun.