koinobori are colorful carp-shaped windsocks traditionally flown in Japan to celebrate Children's Day on May 5th. These decorations symbolize the hope that children will grow strong and healthy, much like the carp that swim upstream against strong currents. Typically made of fabric, koinobori are displayed outside homes and schools, often in a series of different sizes. The largest represents the father, while smaller ones symbolize the mother and children. The vibrant colors and designs make koinobori a festive sight, reflecting the joy and aspirations for children's futures.