A vibrant cartoon with colours and smooth animation. Create a fun, colorful 3D cartoon video for children, around 60-90 seconds long. Story: A cute little boy named Leo finds a small lost bird in a beautiful park. Leo gently helps the bird find its nest. The bird happily reunites with its mother, and Leo smiles as he watches them fly away. Visual style: - Bright, colorful 3D cartoon animation - Cute and expressive characters - Beautiful sunny park environment - Smooth character movements and facial expressions - Fun, cheerful and family-friendly atmosphere - Keep the characters consistent throughout the entire video Voice-over: Use a warm, friendly American English voice-over that sounds natural and engaging for children. Speak clearly at a comfortable pace with appropriate emotions. Synchronize the characters' mouth movements with the dialogue. Add short, simple English dialogue between the characters and a friendly narrator. Use gentle background music and fun nature sound effects such as birds chirping. Make the story easy for young children to understand and include a simple positive lesson about kindness, helping others, and caring for animals. Do not include violence, scary scenes, dangerous behavior, or inappropriate content.