Have fun in a group growing an imaginary urban forest using a civic engagement app. Equipped with your smartphone (or tablet), set out into the urban landscape. Plant trees in real time within an image of the spot where you’re standing as viewed on your device’s screen: a remarkable tree here, a green façade there, or even a row of fruit trees _ the possibilities are endless. Next, compare your creative efforts with those of others or the reality on the ground. This fun, stylish simulation will also give you food for thought. Would your virtual tree actually fit in, in real life? Maybe it’s too tall compared to the nearby buildings? Will the tree have sufficient ground area to spread its roots? Learn about the tree’s requirements in the Wood Wide Web information sheets (http: //woodwideweb.be/fr/atlas/id_105.html). This will enable you to become a budding urban planter, practising the art of planting trees in cities, creating a dialogue between built and living heritage. In this way we can imagine the city of tomorrow, together. For young and old alike.