play·ful /ˈplefəl/
  (a.)愛打趣的,多趣的,嬉戲的
  Play·ful a. Sportive; gamboling; frolicsome; indulging a sportive fancy; humorous; merry; as, a playful child; a playful writer. -- Play*ful*ly, adv. -- Play*ful*ness, n.
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  playful
       adj : full of fun and high spirits; "playful children sjust let
             loose from school" [ant: unplayful]