The purposes of this research were to: 1) develop and determine the efficiency of instruction media in board games to enhance the capability in the Development of Thai Textbook and the happiness in learning for undergraduate students, 2) compare the undergraduate students' learning capability in the Development of Thai Textbook before and after learning instruction media in board game and 3) to study the level of happiness in learning the Development of Thai Textbook for undergraduate students towards learning instruction media in board game. The sample group in this research consisted of 27 third year-undergraduate students, majoring in Thai, at the Faculty of Humanities, Srinakharinwirot University. The data was collected by research and development. The data was analyzed by using mean, standard deviation, t-test dependent, and content analysis. The findings of this study were as follows: (1) The efficiency of the instruction media in board games was 84.81/83.83 which was higher than the specified criteria. (2) The average student's learning capability in the Development of Thai Textbook after learning the instruction media in board games was higher than before using instruction media in board games. (3) The undergraduate students had the highest mean level showing their pleasure in learning the Development of Thai Textbook towards learning instruction media in board game and effective for content analysis regarding the undergraduate students' learning logs from Reflective Journal, it was found that this instruction media in board game enhanced the capability in the Development of Thai Textbook and the happiness in learning abilities.