Children and parents play with building blocks at the Gwanghwamun square in Seoul, South Korea, May 5, 2026. Family activities were held here to mark the Children's Day in South Korea on Tuesday. (Photo by Jun Hyosang/Xinhua)

Children and parents paint pictures at the Gwanghwamun square in Seoul, South Korea, May 5, 2026. Family activities were held here to mark the Children's Day in South Korea on Tuesday. (Photo by Jun Hyosang/Xinhua)