image: Library of Congress

The Red Cross grew almost exponentially with the outbreak of World War I, helped by public contributions of $400 million in money and material to support programs, including the Franco-American Child Welfare exhibition. Held in Roubaix in northern France, which had been brutalized by German occupation, the show taught dentists, doctors, nurses, and social workers healthy ways to raise families. Five thousand attended daily, some bringing their children to receive dental care, and others enrolling their offspring in demonstrations (shown here) by playground directors teaching children how to socialize.