Do you have a creche, a nativity scene, a belen in your house? If so, not only do you have a thing of beauty, you have a good way to introduce even small children to the Christmas story in a very concrete fashion.
Many families hide baby Jesus until 25th (or the evening of the 24th). Some do as I did last year when I gave my goddaughter and her sister a creche. I gave it a piece a day with an accompanying story so they could learn the Christmas story bit by bit. I started on the 18th (because when I counted backwards that’s how many pieces I had) and ended on the 6th of January, when the wisemen staggered across the final bookcase to be with Jesus. I’m going to post the images and the story I wrote, but they’re just there as an example. You should adapt and adopt traditions to suit you, your children, and the size of your creche!