Take my family to Christmas Eve brunch over at my mom's house (she puts on quite a spread) then presents exchange. She always gives my kids waaaay too much stuff but it is nice stuff. Then a lazy afternoon followed by a huge dinner over at my cousins house with my whole dad's side of the family. More presents for all the kids.
After getting home that night, we do two family traditions before the putting the kids to bed: spreading out the reindeer food on the front lawn; lighting the Christmas candle we have sitting in the window (old Irish tradition explained here http://www.fantasy-ireland.com/candl...he-window.html
After the kids are down, Santa shows up and does his thing.