In a certain cheerful room lived seven-year-old Antek. On the boy's desk there was a colourful pencil case, in which the following crayons lived: Red Monia, Green Franek, Blue Gustaw and Yellow Krysia. Antek always arranged them carefully so that each had its own place. One rainy afternoon, when Antek was trying to draw a big rainbow, he suddenly heard a quiet giggle. He looked puzzled at his pencil case, and then.... - Hey, Antek! - came a soft little voice. - Look out, here we are! That was Monia speaking, the red crayon! Antek rubbed his eyes in amazement, but no, it wasn't a dream. Even Gustav, who had always curled elegantly in his pencil case, was now fiddling with the eraser. - Hello, Antek! - called out Green Frankie. - We're bored of lying around all the time! We want to show you something special. Antek looked wide-eyed when suddenly all the crayons started dancing on the desk, creating a colourful whirlpool. Yellow Krysia laughed merrily: - Did you know that at night your desk turns into a land of Colourful Adventures? Antek was delighted and a little nervous. What kind of land is that? What could be happening there? The crayons whispered in his ear to close his eyes and he gripped them tightly. Then he felt the desk tremble slightly.... Was he really about to experience something amazing?