Last year we went on a walk with the kids as my Dad was up with his dogs.
We had our main course lunch, tidied up, went for a walk with the dogs while it was still light and then came back for Christmas log and pudding and more wine.
The children were noticeably calmer and better behaved.
This year we are going to the MIL - she serves lunch so late that a walk is impossible and the kids won't want to go out when we have just arrived so I was thinking about some Christmas outdoor games for the kids while we wait ( and wait) for lunch.,, Any ideas they will be 6.4 and 9 years