Yes, it's always funny to watch when the squabs first discover water. They always seems amazed by it, and the first thing they almost always do is hop right in. They'll leave the nest and start to look around at about age 3 weeks or so, if I remember.
I see your squabs are entering into what we've called the "tumor phase." Their breasts will swell up big as their bodies start to grow. The first time we saw that, we honestly wondered if something was wrong with them! But no, the rest of the body will catch up.
The wife just asked if you would take a picture of the parents, too.