1) French word used in English 2) Playful 
spontaneously and aimlessly playful
Playlike; playfully pretending. ... Origin: G. Ludus, game ... (05 Mar 2000) ... 
ludic 1. In psychiatry; unreal, playlike, quasi, pseudo. Ludic activity: Higher animals have a quantity of energy left after performing all the movements required by their physiological life processes. This excess energy is usually expended (witout purpose) in some way most usually in play activity, called 'ludic activity'. 2. Of or pertaining to...
playful in an aimless way: the ludic behavior of kittens.