A stable group is a group of animals or people that are connected in some way. In this case, the stable group consists of horses, MAGI, and foals. Horses are large, four-legged animals that are often used for riding, racing, and other activities. MAGI are wise men from the Bible who visited Jesus after his birth. Foals are young horses that are usually born in the spring. Together, these three animals form a stable group.