By Orla Guerin
To commemorate World Day Against Child Labour, BBC News has spent a day with child miners in the Democratic Republic of Congo, who work for about one dollar per day. At Ruashi mine, in the Eastern province of Katanga, almost 800 children dig for copper and cobalt.
At eight years of age, Decu has never owned a football, or played a video game. He has no computer, and no TV. He's never been to school, though he passes young pupils in uniform every morning, as he sets off for work.