The construction industry is the single largest employer of migrant labourers in urban India with estimated 40 million building and other construction workers. Most of them live on the construction sites with their children. While they are at work, their children are left to fend for themselves, and frequently suffer from malnutrition, injury and illness. Since 1972, Mumbai Mobile Creches has been one of the few non-profits specifically supporting the health, education and safety of children living on construction sites. MMC has reached over 100,000 children across 270 construction sites in Mumbai, Navi Mumbai and Thane.