Hazar, M., Beyleroglu, M., Tingaz, E.O., Gokyurek, B. and Esenturk, O.K. 2017. A Comparison of Playfulness Levels of the Secondary Students in Kayseri and Trabzon Cities. European Scientific Journal, ESJ. 13, 29 (Oct. 2017), 58. DOI:https://doi.org/10.19044/esj.2017.v13n29p58.