Hey Paulette,
I am one of those that do alot of reading and not much posting!
I just wanted to say, that the average age that a child starts walking is 15 months. Steven is a long way from being late!
I am sure you have noticed differences between your other kids in a variety of areas. Although, this group does seem to be a bunch of early walkers. I certainly would not be worried, let him do what he will do, he will get there in the end.
Kate