Child's Placket Neck Pullover from Last Minute Knitted Gifts, in Plucky MCN Fingering, held doubled. Only mods were to add the stripe and to leave off the buttons. Since I wasn't doing the buttons, I sewed about an inch and a half of the placket closed. And, yes, that is the 4-to-6 year-old size on my 3-and-a-half-year-old nephew.
Umbilical Cord hat from S'n'B, in Rowan Cotton Glace. No mods, except that I was working from memory so I ended up making the newborn size a little long.