Pixies are typically pictured in mythology as mischievous, small in height, and appealingly childish. In contemporary folklore, they are typically represented as having pointed ears and wearing a green clothing with a pointed cap. Their eyes are sometimes characterized as being directed upwards at the temple ends. Pixies are often described as being extremely intelligent but also as being deceitful and frivolous. They are believed to be able to become human for some time before reverting to their original form. This feature makes them difficult to catch, as they can switch bodies without being detected. In culture, the fairy-tale character of a pixie is often used to represent fantasy, imagination, and youth. The term "pixie dust" has become associated with magic because in folklore, pixies can make objects with their dust. Pixies are commonly found in literature, film, and video games. Some examples include David Eddings's series of novels about a young man who becomes a knight; Disney's 1950s movie starring Shirley Temple about a little girl who falls in love with a real-life pixie; the main character of the Final Fantasy game series is a pixie who lives in a world where different crystals control humanity; and I Am Weasel is a comic book written by Matt Fraction with art by Chip Zdarsky that tells the story of a pixie who learns what it means to be human.