If you are looking for a kids’ holiday party idea that can be used as a stand-alone party, as part of a birthday party, or just a traditional gathering during the festive season … why not make cookies? If the idea appeals, it is really quite easy to put together.
One note: take into account the age of the kids who will be attending to determine how much actual baking will be done. If small kids will be there, having the cookies prepared beforehand and having them decorate the cookies would be excellent. A little bit older kids could handle rolling out chilled dough, cutting them into shapes with cookie cutters, doing an activity while they bake and cool, and then decorating. Older kids will appreciate taking on the challenge of making the cookies themselves from start to finish.