Einstein, The World's Smallest Miniature Horse

There are many horse show opportunities offered by registries and show sanctioning organizations worldwide. Some classes include: Halter (horse conformation), in-hand hunter and jumper, driving, liberty, costume, and obstacle or trail classes, and showmanship. There are Local, Regional, National, and "World" competitions.
History
Miniature horses were developed from multiple sources. Many different pony breeds were bred for small size, including the Shetland pony and the Dartmoor pony. There may also have been an infusion of bloodlines from certain breeds of full-sized horses.