No, many more people died in World War 2 than world war 1. It is estimated that 16 million people died in World War 1, and around 60 million in World War 2. World War II was no where near as violent as World War I, but yes, more people died in World War II.
Children were moved out of cities in World War 2 because the cities were being bombed and people did not want the children to die. The children got sent to the countryside to live until the war was over.