My son who is now almost 9 months old is a lot of fun. Over the past few weeks he has been rolling around on the floor and miraculously ends up in another place. He wasn’t really crawling, but more flipping & rolling to get to things. However yesterday, he started to really transition from that into a crawl. He hasn’t quite mastered the crawl yet, but my guess is that in another week or two we will be wishing he would just stay put in one place for longer than five seconds.