Patrick and Will could not be much different in terms of developing gross motor skills. Patrick is all over the place, while Will was content to just sit and play until he was over a year old. We all remember fondly how Will would pull things toward him using a blanket. :) Patrick is VERY different. You cannot take your eye off him, as he is scooting everywhere! I can't say he's crawling, although I think he would be if we didn't have a house full of hardwood/bamboo floors. He gets up on his knees when he's on our area rug in the living room, but other than that, it's the army crawl. He loves to climb under things too, which can be a bit treacherous! Here's a video of Patrick after he scooted away after a diaper change...hence his pant-less state of affairs. :-)