What does a newborn play with?

We pulled out the play mat when Parker was a week old. Frequently throughout the day, he is in his state of "quiet awake" (and very alert!) so we figured we should entertain him somehow! By four weeks old, we could tell he was actively using his hands to reach out to things, including us.

We also went outside for a walk two days in a row, when the temperature reached the 50's & 60's in mid January. He enjoys the baby carrier and promptly falls asleep. I imagine the motion is very similar to what it was like in the womb.