I love the neck line of these 19th century children's dresses. Of course back then young boys wore dresses too, and had long curly hair. This custom was even true well into the 20th century, as my family has photos of my grandfather with long beautifully curly hair wearing a summery white dress; he was five years old.
Here are a few more daguerreotypes of girls (and yet the youngster on the left of the upper right photograph could be a boy). I like the expressions on their faces; particularly, the girl on the bottom. Girls can be a handful and I wonder if this was so with her?