Definition of playfulness:
drollery, jocularity, jest, raillery, espièglerie, burlesque, mischievousness, work, sport, pleasantry, tricksiness, frolicsomeness, impishness, play, facetiousness, joke, fun, prankishness, witticism, humor, waggishness, banter, sportfulness, wit, merriment, sportiveness, friskiness, coltishness, waggery, gaiety, larkiness, mischief.
- "Ontario Teachers' Manuals: Nature Study", Ontario Ministry of Education.
- "The Home and the World", Rabindranath Tagore.
- "The Damnation of Theron Ware", Harold Frederic.