Zach can sit!

I haven't put Zach in the sitting position for ages. I've been letting him focus on his crawling. It turns out he can sit up for a quite a long time! He's fine sitting as long as he doesn't lean over too far to grab something or else he just topples over! His crawling is going well. He goes forward now. We think he might be tearing around the house in a couple of days! Eeeek!