Thigh check! Four-day old thighs:
Oooooh, pinchies! Pinch a-pinch a-pinch!
New superpowers include putting herself to sleep in her own crib LIKE A PERSON, sleeping through the night, exacting tiny baby vengeance for being forced to put herself to sleep by no longer sleeping through the night, LAUGHING OH MY GOD YOU GUYS, and a wide array of dolphin-sounds.
Also, her hands. She's not super-good at directing them (unless it's To The Mouth) but she knows they are hers, and she'll watch them float around in front of her sometimes like, Woah, this is a weird trip.
fresh new baby cannot distinguish you from the surrounding stimuli
three-month-old baby thinks you are a RIOT
In sum, greater awareness + more sleep = grand times.