I'd say he likes to be like his big brothers.
Then tonight as I was getting the big boys to bed I layed Liam in his crib and when I came back in he was rocking himself back and forth, back and forth....ON HIS KNEES!!! Thats right...he is 5 months old and I have a feeling he is going to do exactly what Elijah did...skip sitting and head straight for the knees and crawling stage. I don't mind one bit because eventually he will learn to sit but I can say Im ready for him to be somewhat mobile.
Such a strong little boy!!