Sarah Achieng dances about on the concrete surface, dodging punches and launching her own attacks as she deftly hops back and forth. The gymnasium in which she teaches girls to box is small, with a corrugated iron roof and plaster crumbling from its walls. But to the children here, this building in the middle of the Kariobangi slum is a refuge nonetheless. The gym is run by Boxgirls Kenya, Sarah Achieng’s employer for the past five years. Supported by Laureus Sport for Good, the organisation has around 2,000 beneficiaries in and around Nairobi.