Years ago, I took a photo of a Canadian Goose sitting on her babies almost just like that. One gosling poked her head out of the wing. It was perfect and won a few photography contests.
VERY ADORABLE!
They are the cutest. What is really funny is as the chicks get bigger they still all try to fit in and under the hen. I'll have to take another picture in a week or so to show how far she can spread out her wings and tail to cover her growing brood.