He is always smiling and loves to laugh at his brother and sister. He is rolling over and "talking" a lot. I joke that I get woken up by an owl baby every day, because he starts making a "who, who" sound every morning when he wakes up.
His stats from his 4 month Dr's visit are:
Weight: 13lbs. 12 oz; 24.5 inches long and a head circumference of 16.5 in.
Happy as can be in his bouncy seat
Chillin' in his Bumbo
P.S. Yes, that is drool or spit up all down the front of his shirt, but that's how he always looks.