A migrant child eats as others sit around a fire in a railway repairs hangar where people have set up their tents at the northern Greek border point of Idomeni, Greece, Friday, March 18, 2016. (Photo by Vadim Ghirda/AP Photo)





A migrant girl stands in from of Greek police cordon during a protest demanding the opening of the border between Greece and Macedonia in the northern Greek border station of Idomeni, Greece, Sunday, March 27, 2016. A split appears to have developed among the groups of migrants at the Idomeni border encampment, with Greek riot police who, so far, have used only their shields to protect the border. (Photo by Darko Vojinovic/AP Photo)





A refugee boy pushes a trash can through the mud between tents in a makeshift migrant camp at the northern Greek border post of Idomeni, Wednesday, March 16, 2016. (Photo by Boris Grdanoski/AP Photo)





A girl plays on a makeshift swing suspended from a tree at a public park in New Delhi, India, March 8, 2016. (Photo by Anindito Mukherjee/Reuters)





Boys sit inside a vehicle in the old quarter of Yemen's capital Sanaa March 8, 2016. (Photo by Khaled Abdullah/Reuters)





A migrant who is waiting to cross the Greek-Macedonian border, plays in his tent at a makeshift camp near the village of Idomeni, Greece March 8, 2016. (Photo by Marko Djurica/Reuters)





Students hold geometrical forms to decorate the Freedom School, in the town of al-Tamanah, in the southern countryside of Idlib, Syria March 9, 2016. This school was converted from a poultry farm by the residents of the town more than a year ago. (Photo by Khalil Ashawi/Reuters)





Kurdish children wearing traditional clothes pose for a picture during a celebration for Kurdish outfit day in the northeast Syrian Kurdish city of Qamishli٫ Syria March 10, 2016. (Photo by Rodi Said/Reuters)





An undated handout action still released on March 3, 2016 of “Local Egg” as part of Hong Kong movie “Ten Years” that is nominated for the Best Film award at the upcoming Hong Kong Film Awards, which will be held in Hong Kong, China on April 3, 2016. (Photo by Andy Wong/Reuters/Yen Years Studio)





Boys hold rifles as they take part in a demonstration held by Houthi supporters against Saudi-led air strikes in Yemen's capital Sanaa March 18, 2016. (Photo by Khaled Abdullah/Reuters)





Boys pour coloured water on another boy during Holi celebrations in Kolkata, India, March 24, 2016. (Photo by Rupak De Chowdhuri/Reuters)





Children play cricket in front of parked rickshaws in the old quarters of Delhi, India March 31, 2016. (Photo by Anindito Mukherjee/Reuters)





A child scoops up coloured powder from the ground during the Holi Festival of Colours organised by the Maltese-Indian community in Qormi, outside Valletta, Malta, March 31, 2016. (Photo by Darrin Zammit Lupi/Reuters)





Indian Hindu children carry pots of milk during a religious procession for the Panguni Uthiram festival in Chennai on March 23, 2016. The festival is observed in the Tamil month of Panguni and is celebrated in honor of the Hindu God Murugan where devotees make offerings with sacrificial feats they believe will keep evil spirits away. (Photo by Arun Sankar/AFP Photo)





A boy collects drinking water from a hand pump in Kutubdia, Bangladesh on March 30, 2016. Kutubdia is one of many islands affected by some of the fastest recorded sea-level rises in the world. The island has halved in size in 20 years. (Photo by SIipa/Rex Features/Shutterstock)





A child gestures to a woman at Dongdaemun Design Plaza, the venue for Seoul fashion week, on March 22, 2016. (Photo by Ed Jones/AFP Photo)





A migrant girl plays with her doll at the makeshift camp at the Greek-Macedonian border, near the Greek village of Idomeni on March 30, 2016, where thousands of refugees and migrants are stranded by the Balkan border blockade. UN chief Ban Ki-moon on March 30 called for a united global effort to tackle the Syrian refugee crisis, as he opened a conference on securing resettlement places for nearly half a million of those displaced. More than one million migrants – about half of them Syrians – reached Europe via the Mediterranean last year, a rate of arrivals that has continued through the first three months of 2016. (Photo by Sakis Mitrolidis/AFP Photo)





Filipino boys throw their slippers towards an empty tin can as they play a traditional Filipino game, called “Tumbang Preso”, in Navotas, north of Manila, Philippines, Wednesday, March 16, 2016. (Photo by Aaron Favila/AP Photo)





A migrant girl holds a banner, during protest in the make shift refugee camp, at the northern Greek border point of Idomeni, in Greece, Saturday, March 19, 2016. (Photo by Darko Vojinovic/AP Photo)





A child tries to warm his hands, backdropped by Germany's flag as protesting migrants stage a sit in protest on the railway tracks at northern Greek border station of Idomeni, Wednesday, March 9, 2016. (Photo by Vadim Ghirda/AP Photo)





A child with chocolate stains on his face smiles in his mother's arm at the northern Greek border station of Idomeni, Friday, March 11, 2016. (Photo by Vadim Ghirda/AP Photo)





In this Friday, March 11, 2016 photo, Syrian refugee girl Zahra Mahmoud, 5, from Deir el-Zour, Syria, poses for a picture at an informal tented settlement near the Syrian border on the outskirts of Mafraq, Jordan. About half of the 4.8 million Syrians who fled their homeland are children, and some of the most vulnerable live in dozens of makeshift tent camps, including in Jordan, which has taken in close to 640,000 refugees. (Photo by Muhammed Muheisen/AP Photo)





Owen Moore, left, and Haley Maske, right, both 9, use a rope to pull Olivia Maske 10, on a sled in slushy snow in Owensboro, Ky., Monday, February 15, 2016. Area schools were closed Monday due to snow. (Photo by Alan Warren/The Messenger-Inquirer via AP Photo)