He is content to lie on the floor and play with toys, if only his brute of a sister Annie would let him. I have no idea how to keep her off him so he can have some space to exercise. He can roll belly-to-back and back-to-belly. He raises himself high up on his hands and can scootch in circles, but not forward or backward. He loves to play with his feet and hands as much as any toy. He drools incessantly and gnaws on anything he can grab and put in his mouth.
He wears size 3 diapers now, and depending on the particular brand/item of clothing, he wears size 9 months and 12 months.
During the day, naps are whenever I can get him to take one, and they've been lasting a measly half hour to 45 minutes lately.