Caspian 

Dating back many thousands of years the Caspian is the oldest domesticated breed in the world.
Being a horse, not a pony, the overall impression should be of a well-bred, elegant horse in miniature.
Their intelligence, spirit and kindness, combined with agility, smooth gaits, an amazing natural jump and the ability to keep up with a large horse in all gaits except a full gallop, enables them to excel at many disciplines including harness.
The Caspian is also an exciting choice for crossing with most other breeds.