At four months, babies often reach a new developmental milestone: rolling over. It appears Ezra could care less about such milestones; he is absolutely uninterested in even attempting. Doctor's orders are more tummy time to encourage rolling over. In the meantime, we have been practicing sitting up. He seems to like the view better from a seated position anyway, and prefers sitting up to laying on the floor.
Able to fall asleep anywhere, anytime, even sitting up--looks like mommy!