A kid hack was a horse-drawn vehicle used for transporting children to school in the late 19th and early 20th centuries in the United States.
The vehicle was actually powered by both horses and mules and was usually loaded at the rear to avoid frightening the animals.
A typical kid hack would serve all the farms in the area of the school, and usually transport under 20 children.
The horse-drawn kid hack is considered to be the precursor to the modern yellow school bus.
The Wayne County Historical Museum in Richmond, Indiana has a restored horse-drawn "kid hack" on display.