Jefferson is 3 weeks old and has gained almost 2lbs, is sleeping 5-6 hour stretches at night, "coos" and "ahhs" at us, and is rolling over from tummy to back. He seems to be trying to keep up with his big brother already. The only thing he can't quite get is his thumb. He is trying hard and will sometimes make contact, but for the most part his little mouth lands on his arm. Harrison took until about 4 months to find his thumb consistently. Jefferson has the same determination as Harrison so we will see. In the meantime, I can't wait to see what other tricks Jefferson learns.