Bring out the Irish in you with a fun leprechaun costume for St. Patrick's Day! Leprechauns come straight from Irish folklore. These little green people are a type of fairy that specializes in mischief. And what is St. Patrick's Day without a little mischief!? We've got leprechaun costumes for the whole family. Add your own rainbow with a pot of gold and you'll be ready for everything that comes your way on St. Patrick's Day!