A vibrant cartoon with colours and smooth animation. Create a short 3D animated cartoon story for young children, around 45-60 seconds. Main character: Lulu, a cute little white bunny with pink ears, big friendly eyes, wearing a yellow dress and a small blue backpack. Keep Lulu's appearance exactly the same throughout the entire video. Story: Lulu is playing in her cozy colorful bedroom when she notices that one chocolate cookie from the kitchen is missing. Her little friend Mimi, a cute small brown bear, comes into the room. Lulu first thinks Mimi took the cookie, but then she realizes she should not accuse her friend without knowing the truth. They look around together and discover the cookie under Lulu's own toy box. Lulu feels embarrassed and says sorry to Mimi. Mimi smiles and forgives her. End with Lulu saying: "I learned that we should always know the truth before blaming someone." Style: Cute colorful 3D children's animation, soft lighting, adorable characters, bright cheerful environment, gentle movements, expressive faces, safe and appropriate for young children. Audio: Add a gentle child-friendly narrator and character dialogue. NO songs. NO background music. Only soft natural sound effects such as footsteps, room sounds and a gentle happy ending sound. Make the story easy for children to understand, with clear English pronunciation and simple sentences. Create the complete video ready to watch, with smooth transitions between scenes and English subtitles.