"Do any of you go to work?" we ask the children. The question makes the smiles vanish from their faces in an instant. Murmurs of "no" and immediate head-shaking goes around the dingy classroom in Kondamudusupallam Ambedkar Nagar village, in rural Andhra Pradesh. There's a quick exchange of glances among the boys and girls, and, as if on cue, they all hang their heads in silence. But 13-year-old Meghna looks at us, and giggles.