Through a combination of innate reflexes and personal style, a baby's hands and arms can be very bold and expressive.
I haven't yet been able to capture the fleeting "jazz hands" reflex when our little peanut is startled, but I do have plenty of chances to draw how she drinks milk with her pinky up, as if sipping tea with royalty.
There is so much personality in those tightly-closed fists, too.
If it weren't for the chilly winter weather, I'd likely be sketching her tiny baby toes as well--but for now, warm socks are the priority. (A project for spring?)