Pol Landman Brignoni, mathematician and co-director of Explorium, could not have imagined that in the summer of 2019, after participating in an Ultimate Frisbee tournament on Lake Como in northern Italy and hitchhiking back to Lyon, his life would take a turn for the worse. He had spent weeks desperately searching for internships for his mathematics degree, but everything he was offered—major banks or the largest meat distributor in Europe—didn't interest him in the least: "I was looking for something related to the world of education." While he was working as a tutor, someone suggested he ask Explorium, the science leisure association, run at the time by Laura Morera, who had been his teacher at school. He wrote to her, and she immediately suggested they run a math summer camp in September.