Down on the beach, Mister Rainbow was sitting under a palm tree, looking out to sea. A child came up to him. — Hello, my name is Quentin, and I would like to ask you an important question. — Hello Quentin, replied Mister Rainbow. I don't think we've met... you seem to be a boy who knows what he wants, added the old man, giving his white beard a stroke. — So can I? — I'd very much like to hear this important question of yours. The young boy swallowed hard before speaking, while the old man looked out to sea, all the while listening carefully. — Please will you tell me the story of the blue bana