This is a popular Korean folktale re-told by many generations of Korean parents to their young children. It is a story about 2 frogs who never obey their mother and always do just the opposite. Growing up, our parents would tell us this story to teach us the importance of obedience. In Korea, children who don't listen to their mother are called "chung-gaeguri" or green frogs. Author Yumi Heo does a good job of telling the story in English with artistic graphic illustration.
Makes a great bedtime story with a good lesson!