bamrunguea, supa, Panya, P. and Worakham, P. (2024) “Research and Development Programs to Enhance Problem-Solving Ability for 5-Years-Old Children”, Ratchaphruek Journal. ์์Nakhon Ratchasima, Thailand, 22(1), pp. 203–218. doi: 10.14456/rpjnrru.2024.14.