I am re-watching Game of Thrones before the new season, and I'm asking a lot of questions that I never even thought of before. Craster's sons being given as sacrifice is one that's really bothering me, because Craster gives them up as new bornbabiesborn babies. So I've been wondering when they're changed to White Walkers. (I assume that's what happens, because I'm yet to read the books.)
Are they raised as humans till they're older and stronger by White Walkers? Or do White Walker babies age? If anyone could help me out, that would be ace, because my friend and I have disagreeing theories!