Well, obviously we have no idea how old the baby who played baby Clark was. He could easily have been (and most likely was) older than the 2.5 months that the two dates would indicate.
But it can be very difficult to accurately judge a baby's age by the size. My baby (who's now a teenager) was close to 10 pounds when he was born, which put him at 20 pounds by 4 months, and time to move into a forward-facing car seat. For babies with birth weights of 6 or 7 pounds (not at all unusual), it would take them considerably longer to move into the front-facing car seat.
Kathy
