Wow, neat looking coop, Blessed! Very fancy and looks like it will do the job very well. As I said before, be very careful with chickens on your shoulders. I loved mine when they did that, too, but when one pecked at my eyeball, it hurt like heck, scratched the eye. So, just a warning to make sure your kids don't look directly at them while they are on their shoulder. It's not worth getting pecked in the eye. Or, tell them to wear glasses or safety goggles. LOL
My mom always said that older store bought eggs peel far easier than fresh ones, and we all know that what the stores calls "fresh" are probably minimally a week old, if not more. Someone said that a fresh egg can last maybe 2 weeks unrefrigerated and 2 months in the fridge? I can't remember the specifics, but was surprised at the length of time they would last before putting in the fridge.
Also, IF you want to raise a clutch of chickens, save the eggs, candle them and make sure they are fertile, then you you have a clutch (maybe 12 eggs or however many it would take to fill up a nesting box for the hen to lay on, put them into the box that the hen that seems to be the most likely to "set" will use. I think people often think that hens lay an egg and are supposed to sit on it all day, but they only lay one egg a day, and won't start sitting until they have a full clutch. THEN the eggs all get incubated at the same time. And, somehow, the hen's body stops producing any new eggs once she starts sitting and incubating them eggs.