From outside the house (just to be safe) for the living room try opening the console and using the two commands -
prid 000E25D0
enable
For the childrens room try the same but replace 000E25D0 with XX004189 the XX being the load order of Hearthfire click the blue link if you don't know how to find it. If the wall with the shelves aren't properly removed from where the childs room goes (and its possable you got the room but can't see it) you'll also need -
prid XX00418C
disable
You may also (or instead of) need D89EB or XX00418A for that one but its hard to tell.