This is a wonderful Cabinet card of a young boy on his tricycle posing in the studio of H. Osterhout in Middletown, New York. Check out the details of the tricycle. In addition, note the young boys outfit. He is wearing a terrific hat, a bow tie or scarf, and great shoes. What is on his lap? It looks like a skirt. Is this young boy actually a young girl? What do you think?
THE CABINET CARD GALLERY 
What a fantastic cap!
For centuries, boys wore dresses until about age 3-8 (Wealthier and upper classes breeched their boys later, in general). This practice gradually faded after the close of the Edwardian era, though I’ve talked to members of my grandparent’s generation (born just before the depression) and some reported being dressed in skirts until they were toilet-trained.
This is a good site on the subject: Historical Boy’s Clothes http://members.tripod.com/~histclo/