Well, Harper has finally gotten to the point where milk from Mom is no longer enough. While I started cereal with both Claire and Henry at about 5 months, I waited until Harper hit the 6 month mark to start her on solids. I think she was ready.
Though she gave me the same sour faces that Claire and Henry did when they tried cereal for the first time, Harper was definitely more physiologically mature and kept most of it in her mouth. She was interested in the food, and even enthusiastic about trying again!