"Was geht ab?" is a Talente Regional project in which the topics of mobility, traffic safety and public space are addressed with 5 classes from the 21st district in Vienna. In excursions and workshops, the students are encouraged to understand "mobility" in an interdisciplinary way in the context of the environment, health, psychology and technology. As part of the project, this Citizen Science App was developed, with which the project classes and also classes from other schools can create an interactive map. This visualizes the public space from the perspective of children and young people.