A Christmas Carol is by far the best Christmas eve story! The Disney version with Jim Carry is great, it's very true to the original Dickens' novel and quite dark as such, and the Muppet's one is just wonderful, and so much fun.
Or, even better, you could all share the story as a family! There are lots of adaptations of it suitable for children. Last year Radio 4 serialised the original novel over the last couple of evenings leading up to Christmas Eve, it was wonderful old-fashioned festive entertainment.