I stopped doing a big meal on Christmas when ds was about 4 and after cooking and getting it to the table, he looked up and asked if he could just have a pb&j and go back to his new toys,lol. Since then it is all just finger foods, served buffet style and everyone brings something. Ex/ rolled up deli meats, tuna/egg finger rolls, cheese crackers, deviled eggs, fruit salad etc etc.
Everyone loves it and says Christmas at our house is the most relaxing.
Christmas eve is just as simple, chinese or pizza with board games and a few drinks then a walk around the neighborhood to look at lights etc