One of Adam's favorite places to be is on the changing table. It's not a sure fire way to make him happy, but usually once the dirty diaper is off he's happy to stay on the table for a while. I grabbed this video post diaper change - no cuts or fades in this video:

I also posted a couple more photos, you know where to find 'em. I took another "adam in the middle of our giant bed" photo, here's the comparison. Left: 1 week, right: 6 weeks

 

Update:We measured Adam in at ~24.25". That's ~3 inches in the last 6 weeks.