The flapper: short bobbed or shingled hair, straight loose knee-length dresses with a dropped waistline, silk or rayon stockings with garters, heavy makeup, and long beaded necklaces. Flappers are also associated with Jazz and dances like the Charleston.
This is a picture of a little person, Edward Garrett, who played a baby in the farce "The Little Stranger" on Broadway. So, the picture is not as weird as it looks. It is a picture of a man, not a child.