As foals, miniature horses play extensively, running and chasing other foals, and playing with large balls. As the miniature horse matures they lose interest in play, but the mini horse can still enjoy games. One of the favorite games for adult miniature horses is bobbing for apples. You simply fill a toddler pool with six inches of water, and drop in two apples!
Miniature horses also like to run and play sometimes, as you can see in this video.