As the school day finishes in Lodwar, Turkana, a group of boys runs out onto a sandy football pitch between their classrooms. There is a flash of colour beneath their pink school shirts, which some of them peel off to reveal international football club shirts beneath. They run up and down the pitch with tremendous energy, gesturing at each other. Finally, 13-year-old Ezra, wearing an Atletico Madrid t-shirt, gets a clear shot at the goal. He lines it up and shoots. The ball swerves past the goalkeeper and lands behind the goalpost, kicking up a small cloud of dust as it lands. Ezra throws up his arms in celebration. But there is little or no sound from the players, all of whom are fully or partially deaf.