As we mark the World Day Against Child Labour, more than 115-million children are forced to work in jobs that are dirty, dangerous and degrading. World Vision is fighting to keep the conversation about child slavery going strong. Wednesday in Toronto and Vancouver, we staged potentially shocking events in store windows to generate discussion about child slavery.

The traffickers watch for children who are weak, or willing. A child who made the mistake of walking alone. A boy, stepping up to support his family. A girl, numb with fear, about to be sold by her own relatives to feed her younger siblings. What do their futures hold?

Imagine the four walls around you are basically walls of blue tarp held up by tree branches. Your floor is a slab of cement if you're lucky, or a dirt floor where rats and bugs greet you at every corner as they scavenge through heaps of litter, scrap, and human waste. This is the reality of a Delhi slum.