playful

from WordNet (r) 3.0 (2006)

playful
    adj 1: full of fun and high spirits; "playful children just let
           loose from school" [ant: {serious}, {sober}, {unplayful}]

from The Collaborative International Dictionary of English v.0.48

Playful \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.
   [1913 Webster]

from Moby Thesaurus II by Grady Ward, 1.0

71 Moby Thesaurus words for "playful":
      animated, antic, arch, blithe, capersome, cheerful, coltish,
      dashing, devilish, elfish, elvish, exuberant, facetious, foolish,
      frisky, frolicsome, full of beans, full of mischief, fun-loving,
      gamesome, gay, gleeful, hearty, high-spirited, hilarious, humorous,
      impish, jesting, jocund, joking, jolly, jovial, kittenish, knavish,
      larking, larkish, lighthearted, lively, merry, mirthful,
      mischief-loving, mischievous, pixie, pixieish, pixilated, prankish,
      pranksome, pranky, puckish, roguish, rollicking, rollicksome,
      rompish, scampish, scapegrace, skittish, spirited, sportful,
      sportive, sprightly, teasing, trickish, tricksy, tricky, vital,
      vivacious, waggish, whimsical, wicked, zestful, zippy