Go to Christmas Eve Service.
If you belong to a church that has services Christmas Eve, go there. If you don't belong to a church or your church doesn't have Christmas Eve services; attend a church that does for that night. Most churches welcome guests any time and will enjoy your presence on Christmas Eve.
After church, take time to talk about the meaning of Christmas and what took place on that very first one.
Tuck everyone into bed in fresh, warm pajamas ...dreaming of sugar plums and what awaits them in the morning.