“Free your city!” is a game which can be used at family-friendly events, like Earth Day, Car-free Days. It consists of a huge, colorful map of the city, with lots of space for vehicles: parking lots, roads. We filled the map with stickers of cars. Participants could cut and color various objects to replace them: trams, trolleybuses, trees, flowers, bicycles, playgrounds, coffee shops. The children could remove the car stickers, and glue their artworks on the map. The time of coloring is a great opportunity to talk to the children and their parents about the impact of cars in the cities, as the game highlights this simple connection: if you put a bus on the picture, you can remove at least 10 cars in exchange. As the kids free the city of cars, the map slowly becomes a vibrant, colorful, eye-catching image of a livable city.