The game can be played for example in schools; it is not restricted to the science centre environment.  The players orient in teams of two or three in order to find five checkpoints that are presented as five cities in Finland. The cities can be chosen from another country as well.  The teams need to solve a task at each checkpoint. They also have to get travel tickets to be able to reach these checkpoints.  The starting point is presented as the travel agency, and it can be located in a classroom. The teacher or explainer works at this travel agency. He/she visualizes the carbon dioxide emissions produced by the teams' travel choices with an equivalent amount of dry peas.