Thank you for the advice.
I waited until they were not around on a very warm evening and first took out the bug screen on the window. And left them alone for a day or two.
The boys and I have looked out through the window each morning before school to see her sitting on the eggs. I'm pretty sure she sees us through the glass ... west facing window. Since they have to get ready it is no more than a minute watching her and wondering what is going on in the nest.
Yesterday we were doing the same, and with no warning she jumped up and flew away, just as quick as she left, daddy came in and the new babies stuck their heads up for breakfast! We had no idea they were there. Even for an old fart it was awesome, of course the boys were super excited too. Certain that mom and dad had heard our voices and high fives,I shuffled them away and we went about our day.
I have cleaned up the window, (dad was not too happy about that,lol) am going to work on darkening the room a bit to grab some pics over the next few days. Obviously I don't know much about this stuff, but the chicks have changed appearance quite a bit from yesterday to today. Makes me think yesterday might have been their birthday.
Mom and dad are busy feeding the chicks, so I'm going to try to give them their space. This is real cool stuff and I'm so glad my boys and I get to witness it.