On the big day, get the children to help you in whatever way they can (laying the table, putting serviettes next to plates, placing name cards, etc).
Get them to prepare and put on a performance (a play, show or dance).
Keep to tradition! On Christmas Day everyone gets dressed up in their best, so get your finery on, put sparkle in your hair and get your make-up out.
Give the children their own disposable camera. Children over the age of 5 can have endless fun taking photos of the day that you can put together in little albums, copy and send to your guests.