In his fiftieth week, Xander is: developing a sense of humor (he loves to sniff fast through a scrunched up nose, make a fish face, and put a puff on his sippy cup and tip it back so he can eat it and then take a drink); using the kitchen table as his own personal jungle gym; and taking a surprising amount of steps (I haven’t quite stopped counting his steps yet or saying, “Tom/Jonas, look!!!” every time he launches out but we’re getting there because he’s quickly starting to walk as much as he crawls).