Well, I collect nativity scenes so I'm sure that will bias my response a bit. I don't see any reason why they can't have a second (or more) nativity scene, especially if their first has been incorporated into every day play.
That is a cute set. I can see it coming home with us this year. We have the FP Little People set and the Playmobil set, although the Playmobil one is actually mine, pre-children so it has been put away for the last couple of years. I'll probably pull it out again once the youngest is a bit older. I'm a little too uptight about having all the little bits to just let them have at it.
I'd really like to start buying each girl a piece from the Holztiger style sets every year so that when they move out, they will each have a set to take with them but I haven't yet.
Veronica
Miss Ellie 11/03
Baby Audrey 4/08