1 wk old

Baby D sleeps most of the day and feeds every two to three hours. Babies are born with many automatic reflexes that help them make the transition to life outside the womb. Stroke her cheek, and she'll turn her head toward my finger and move her mouth as if groping for a nipple. If I hold her upright, she'll move her legs as if walking. Most of these automatic reflexes disappear within weeks of birth. (content excerpted from Baby Center)

2 wks old

A whole week has passed, but it seem more like a lifetime. As I am adjusting to feedings and getting by on less sleep, baby D is also adjusting to her new world. She sleeps in short naps, wakes to feed, and spends some time quietly alert before drifting off to sleep again. Babies' eyes focus best on objects between 8 and 15 inches away – not coincidentally, the distance to your face when held in your arms. 

3 wks old

Every baby has a unique temperament. Some are placid and agreeable, while others are more sensitive. One thing all babies have in common is that they communicate with you by crying. Sometime in the first month, you'll begin to hear another kind of sound. That's when most babies find their voices. When your baby is calm and alert, you may notice she says a little "ooh" or "aah" when she sees you or hears you approaching. 

4 wks old

Baby D can probably focus on and track moving objects now. Try giving her new skills a workout by slowly passing a toy in front of her face or by having a little "staring contest" during which we walk slowly back and forth in front of her. Watch how her eyes lock with yours and follow along with your movement. This skill is a building block for hand-eye coordination, which will come later.