. The traditional krathong is made from a cross-section of a banana tree trunk, which is then elaborately decorated with folded banana leaves and flowers in intricate towering designs. You will find hundreds of krathongs for sell around the main Loy Krathong festivity areas. Often school children will make their own krathongs in school or with their family. They’ll even have krathong contests in school to see who can craft the most beautiful and artistic float.