Our planet is increasingly urban. Most of that growth is taking place in developing countries and most of it is associated with poverty. About half of the world's poor already live in urban areas and the number of people living in informal urban settlements is expected to double in the next 25 years. By the year 2025, some 60 per cent of children in the developing world will live in cities and half will be poor. At the same time, a worldwide trend of government decentralization is underway, i.e., local governments are assuming more responsibility for providing social services, a function once performed by state governments. The convergence of these two trends means that cities need to equip themselves to serve a growing number of children, families, communities, and to help them find solutions to poverty. The Child Friendly Cities approach is a means to both ends. It provides a strategy to implement the Convention on the Rights of the Child at the local level of governance.