The reality is that existing games are commercial or violent rather than informative. So, such a phenomenon resulted in many social problems. To solve such problems, I designed and implemented a game which is not violent but educative and child-friendly. In this thesis, an educative game is defined and its characteristics are described. I designed the user interface of the game for children, proposed relevant algorithms, and showed resultant screens of the game. Also, I compared the game with the existing games in order to prove that my game is non-violent, non-commercial, and rather educative. This ladder rejection game is different from the existing game in terms of design, functions, and contents of the screen. This paper contains specific explanations about the supplemented ladder rejection game. First, the design of this ladder rejection game extended fundamental principles of the existing game and added new diverse functions.