So it's been great having a little one to play with! I got my Montessori materials back out for his age group. He is such a quick learner! (okay, I'm biased...) but he is already lifting his head (has been since he was a week old). And he is tracking with his eyes. Loves to be put on his stomach and is a great mover...already kicking and pushing with his legs! What a stud!