Think of the minor games you play with your friends in your free time. Can you remember the rules of those games? For example, in ''Gas maru kireema'' (changing trees) the player who is not able to claim a ‘tree’ has to go to the center; in ''Kawda raja'' (who is the king) the players lose the game if they step over the boundary; in hopscotch, players are disqualified if they step on a line. Can you remember how these rules made it easier for you to enjoy the game without having an issue with other players?