This winter, I let my chicks roam outside after day 4 for a couple of hours each day to half a day as they get older if it is not too cold. I move them outside in a Biddie coop I built at 3 to 4 weeks, with a light they can get under for warmth. I put a tarp over it in case of snow, rain or winds. The biddie coop is set next to one of my big coops so the kids can see the bigger ones. I let them free range with the older chickens (THE KIDS GET AN HOUR LEAD TIME BEFORE) I release the older ones once they are outside. I find that helps when I move them finally into the bigger coop. I don't join my chickens til they are almost as big as the older chickens... That way, they stand a chance agaist the big old bad roosters... The boys love them some young stuff.
Now if I have babies in the summer I do things slightly different, but the same but not as protected from the weather...
Brookeee, for your kids, I would put them in the rabbit hutch thats in the coop or next it it, depending if it is enclosed or open air, which mine are...
Good luck and you have 2 fine looking girls, I see....