Small blue Sulkyc. 1920
A small sulky like this would probably be only used for short trips with a much smaller horse to pull it like a pony.
The Sulky was originally a light, open, one-horse, four-wheeled vehicle with its single seat for only one person fixed on its shafts. It is thought to have been invented in the early 19th century by an English physician and was supposedly named for his sulkiness in wishing to sit alone. The sulky was adapted to two wheels and widely used by doctors and others who had to travel extensively by themselves.
When the sulky was donated to the Museum the donor advised that her parents used it, possibly for visiting, going to church etc.
The seat looks very uncomfortable so it may be incomplete.