1) Cunningly 2) Dizzily 3) Flippantly 4) Giddily 5) Impishly 6) In a playful manner 7) Knowingly 8) Laughingly 9) Light-heartedly 10) Lightly 11) Merrily 12) Mischievously 13) Naughtily 14) Perkily 15) Roguishly 1) For fun 2) Infun 3) In jest 4) Insport 5) Mischievously 6) Scherzando 
[adv] - in a playful manner
adverb in a playful manner; `she loosened the half-hoop of diamonds on her left hand third finger and held it out to him playfully`