Cash has started to crawl like a big boy now but he'll only do it when he's naked. I think it's because the floor is too cold on his belly so it forces him to get up on his hands. He's nine months now and getting so big . He is still a happy baby but nap time is no longer his favorite time he fights sleep pretty bad. He's also getting his top four teeth at the same time so that can't feel good. We just love our little Cash Money! I put a video of him crawling on you tube just search strbrte and it will pull up all my videos.