One sunny morning, a colourful circus came to the town of Zosia and Stasio. A huge red and yellow tent was set up in a large meadow, and all around it smelled of candyfloss and popcorn. Zosia held Stasio's hand, both of them opening their eyes wide with surprise and joy. Suddenly, Teos the clown appeared next to them with his big red nose and rainbow wig. He smiled broadly and called out: "Do you want to see something amazing?" The children nodded their heads. Teos placed a large blue suitcase decorated with gold stars on the grass. "This suitcase hides the funniest secret of the circus!" - he said mysteriously. Suddenly, the suitcase started jumping up and making quiet laughing sounds! Zosia moved a little closer and Staś held her by the sleeve. Everyone stood in suspense, watching the suitcase shake harder and harder.... And then the lid began to open slowly!