Rungrueang , S. and Norasingha, P. 2026. THE EFFECT OF PLAY THERAPY ACTIVITIES ON AGGRESSIVE BEHAVIOR AND ACADEMIC ACHIEVEMENT OF PRIMARY SCHOOL STUDENTS PHRANAKHON SI AYUTTHAYA PROVINCE . Journal of Liberal Art of Rajamangala University of Technology Suvarnabhumi. 8, 1 (Mar. 2026), 226–239.