He can roll! Oops! I shouldn’t say that, he can flip from tummy to back first, then about a week later, he’s able to flip from back to tummy. He has 1 tooth on Oct 20 and another one came on Oct 29. They’re both the front lower teeth. He tries to sit up but almost always lean to the front. But when he was 1 week to 6 months, he could sit for a minute or 2 without support. He loves watching the fishy in our aquarium, we called it his private TV with fishy channel. And he notice we have a cat at home!