1) Their pooping noise can embarrass any adult in the room.
2) The rooting reflex is comical (although frustrating) when they get to a feverish pace.
3) The little faces they make, specifically when they put their mouth in an o shape and the smooshy
sideway face when they stretch.
4) Sleepy smiles (so cute).
5) Grunts, snorts, and whatever else they come out with.