Delightful, Brian. I really like their expressions.
The only zinger I see in this is that the buckles of her shoes are on the "insides" of her ankles, as opposed to the "outsides", where they belong. Once upon a time, when I was in grade school, and had a pair of "buckle shoes", I wore them on the wrong feet because that way I could easily see to fasten the buckles. They were in approximately the position of the buckle in your drawing. Within about 15 minutes my socks were torn and my ankles bleeding through them. I had tripped a couple of times as well because of the buckles snagging on each other as my legs and feet moved past each other during each stride. Mother was not amused on several counts, as the shoes and socks were "best dress". Pain being a good teacher; I never tried that bit of laziness again. It is a point to remember for costume design.