Fairies were often said to be invisible, usually of smaller stature than humans. It was believed they could be helpful to humans, but might be dangerous and evil if offended. They were often considered just mischievous and whimsical in a childlike manner, but were believed to have magical powers.Typical activities of fairies in relation to human beings include abducting babies and putting changelings in their place; helping plants and flowers to grow; sweeping floors; bestowing miraculous gifts for friendship (such as removing deformities or breaking the spells of witches); performing mischievous pranks like milking cows in the fields, soiling clothes put out to dry, curdling milk, and spoiling crops.Fairyland was usually underground or in some magical other dimension. Here time became mystically changed—one night in fairyland might equal a lifetime in the human world. Some of the most romantic and poignant folktales concern mortals who fall in love with a fairy queen and are transported to the magical world of fairyland where all wishes come true, but through breaking some taboo or indulging in homesickness for earthly existence, the mortal is suddenly returned to his world, in which scores of years have passed.