War and poverty have forced 50 million children around the world from their homes, according to UNICEF.
Up to 28 million of the children have been uprooted by violent conflict, with nearly as many abandoning their homes in search of a better life, says a report released by the UN agency.
The report, entitled Uprooted: The Growing Crisis for Refugee and Migrant Children, also says that the number of child refugees has more than doubled in the past 10 years from four million to 8.2 million.
UNICEF describes the children as some of the most vulnerable people on earth and gives warning that if governments do not act, the numbers are likely to grow.