Playtime not wasted

Children play with clay made from used coffee grounds during the “GREEN Hangang” festival at Gwangnaru Hangang Park in Seoul on Sept. 6. Hosted by the Seoul Metropolitan Government for Resource Circulation Day, the two-day festival featured "plogging" — picking up litter while jogging — for 200 participants daily, 10 hands-on activities using discarded materials and eight environmentally friendly-themed games. The event was designed to encourage residents to practice recycling, upcycling and environmental protection in everyday life.