Children react after what activists said was shelling by forces loyal to Syria's President Bashar al-Assad near the Syrian Arab Red Crescent center in the Douma neighborhood of Damascus May 6, 2015. (Photo by Bassam Khabieh/Reuters)

Young gymnasts practice pull-up on a bar at a gymnasium of a sports school in Jiaxing, Zhejiang province April 11, 2015. (Photo by William Hong/Reuters)

A group of children and their dog playing an Easter game in Cardiff. The game involves trying to eat an Easter egg off a piece of string without using their hands. (Photo by Richards/Fox Photos/Getty Images). 26th March 1937

A family of children share a bath in Japan, circa 1965. (Photo by Three Lions/Hulton Archive/Getty Images)

Iraqi paramilitary troops fire towards Islamic State militants during a battle with Islamic State militants on the outskirts of the ancient city of Hatra near Mosul,Iraq April 26, 2017. (Photo by Reuters/Stringer)

A participant performs during the Perfect Pole 2016 pole dance championship in the southern city of Stavropol, Russia, October 22, 2016. (Photo by Eduard Korniyenko/Reuters)

Jesus Moreno, 60, feeds pigeons in downtown Monterrey, Mexico July 7, 2015. For the past 30 years Moreno, who was once homeless, a drug addict, and formerly working as a investigative policeman, has been feeding pigeons twice a day, because to him they represent peace and the only way to communicate to God, local media reported. (Photo by Daniel Becerril/Reuters)

A dog dressed in a costume takes part in the Pet's Halloween Day parade at El Olivar Park in San Isidro, Lima, October 31, 2015. (Photo by Mariana Bazo/Reuters)