A vibrant cartoon with colours and smooth animation. Create a 60-second colorful 3D cartoon video for children ages 4-7. CHARACTERS: A cheerful 6-year-old cartoon child named Leo, with big expressive eyes, colorful clothes, and a friendly smile. A magical floating balloon that can change colors and glow softly. SETTING: A bright, playful cartoon park filled with flowers, trees, butterflies, clouds, and a small rainbow in the sky. Everything should look safe, cheerful, colorful, and child-friendly. STORY & ACTIONS: 0-10 seconds: Leo walks through the park and notices a small glowing red balloon floating beside a tree. Leo looks surprised and happily reaches toward it. 10-20 seconds: The balloon changes from red to blue, then yellow, then green. Leo laughs and follows it as it gently floats through the park. 20-35 seconds: The balloon flies around flowers and trees, leading Leo to a colorful little bridge. Leo runs after it with playful, energetic movements. 35-48 seconds: The balloon suddenly creates a trail of sparkling stars in the air. Leo follows the sparkling trail and discovers a beautiful rainbow appearing above the park. 48-56 seconds: Leo happily waves at the rainbow while the balloon changes into many bright colors and floats around him. 56-60 seconds: The balloon gently lands in Leo's hands. Leo smiles at the camera and waves goodbye as colorful stars appear around him. PACING: Fast enough to keep young children interested, but every action must remain simple and easy to understand. Use clear visual storytelling with smooth transitions and playful comedic reactions. CAMERA: Begin with a wide establishing shot of the park. Use medium shots for Leo's reactions, gentle tracking shots while following the balloon, occasional smooth close-ups of the balloon changing colors, and a final wide shot showing Leo, the rainbow, and the colorful park. Use gentle camera movement suitable for young children. VISUAL STYLE: High-quality original 3D cartoon animation, bright cheerful colors, soft rounded shapes, expressive faces, cute proportions, smooth animation, warm lighting, colorful environments, magical sparkles, clean compositions, and a joyful preschool-friendly atmosphere. No copyrighted characters, logos, brands, or recognizable existing fictional characters. AUDIO: Cheerful original children's instrumental music, soft magical sound effects when the balloon changes color, light playful sounds during movement, and a happy ending. No copyrighted songs. Make the entire video visually engaging, wholesome, safe, simple, and easy for children ages 4-7 to follow.