Answer:
In addition to breeding Miniatures, many people train their Miniature to show. Miniatures can be trained to drive and jump; they are very smart and can learn an obstacle course very quickly.
But, above all, Miniatures make wonderful pets and companions. They have proven themselves over and over as Ambassadors of Good Will by participating in exhibitions, parades, and fairs, and reaching out their tiny soft noses to invalids, the elderly in homes, and hospitalized children. Their small size and gentle disposition makes them very attractive to people who might be afraid of a full-size horse. And often older people who can no longer handle full-size horses find that a Miniature is just so easy that they can remain involved with horses.