Growing Baby

Last week Collin had his four month check-up all is well with him and he weighs 15.8 lbs (51 percentile), and 26 3/4 inches (92 percentile).
Yesterday he reached a new milestone, I caught him crawling on his hands and knees, with belly off the ground, it was only for a quick scooch, but he did it 3 times that I saw. He is getting very good at going where he wants to, and very soon he will always be up on his hands and knees.