Anya: I think I remember liking this development chart. There's a huge range in "normal" and rolling/sitting/crawling early or late aren't indicative of much of anything later in life. I've never done exercises with little ones. My babies always hated "tummy time" but they spent plenty of time chest to chest on me in a sling, which really uses the same muscles.
10/14/12 at 9:04pm