"What's going on?" is a "Talente Regional" Project, in which 5 school classes from the 21st district in Vienna are confronted with topics like mobility, road safety and public space. By undertaking workshops and study trips the children are encouraged to understand the topic mobility interdisciplinary in connection with environment, health, psychology and technique. In the framework of the project this application was developed in order to offer the project classes as well as classes from other schools the possibility to create a interactive map. This App enables children and teenagers to visualize public spaces from their own viewpoints.