Advent readings

I want to read some Advent stories to the boys this year. I'd like a few good renditions of the Christmas story, of course, and also I'd love to find a good preschool or kindergarten level story of the real Saint Nicholas. If there are other saints with special days during Advent, their stories would be great, too. Oh, and a story of the three kings (to read before Epiphany). Do any of you have any favorites?