Blue Eyes
Back to the White Walkers. There were many things left unanswered in regards to the White Walkers and their motives. One of the bigger unanswered questions, however, involves babies. A man named Craster willingly let the White Walkers take his infant sons to the Night King. The Night King promptly turned the babies into wights. Annoyingly, there was no further explanation into why he wanted the babies, or what happened to them after he turned them.
Image Source: IMDb