IJG has changed a lot in the last month. He weighs 13 pounds 5 ounces (more than double his birth weight). He is now smiling often in response to us talking to him and he "talks" back to us. He is able to lift his head and chest up for short periods of time when laying on his stomach. He is still not interested in looking at or holding toys, but is very interested in people's faces. He is a good sleeper at night. He usually goes to sleep between 8:30 and 9:30 pm and sleeps 5-6 hours straight during the first part of the night (he has slept up to 8 straight hours). I only have to get up once to feed him during the night, and he wakes for the day between 6:30 and 7:30 am. He enjoys having his diaper changed (or just being laid down on his back to await this procedure), being outside, bouncing, and getting bathed.
Compare to his 1 month pic: