Lately, Ethan has been experimenting with standing unsupported. He would (as usual) hold on to something (sofa or cabinet) and then let go of both hands for a couple of seconds and then sit down again.
Yesterday, he did it again - this time with more precision and for a longer period. 5 seconds or so, I think. Pete thinks he is gearing up for his upcoming birthday by trying his best to accelerate walking. We'll see.