Once, Kaka and his brothers Wenwen and Xixi went for a walk in the woods. Suddenly, a voice came from the tree: "Be careful, danger!" The three brothers saw Uncle Shasha standing on the tree. "Uncle, where is the danger?" Kaka asked. "Shh!" Uncle Shasha made a gesture, then stomped hard, causing snow to fall onto their necks. "Wow, that's so cold!"