babies come out all bent and squished. If they couldn't bend their knees they wouldn't fit in the tight confines of the womb. Trust me, I just had an infant cut out of my tummy 2.5 months ago and he was all curled up in the "fetal position" in there. He is also perfectly capable of operating his legs and LOVES to splash in the bathtub and kick Mommy or Daddy in the stomach while he is having his diaper changed. I love my little man Those are some wierd facts though!! When Tyler wakes up I will have to feel his knees