A vibrant cartoon with colours and smooth animation. Create two original, adorable children's cartoon characters for an educational animated series. The first character is a cheerful little boy, around 5-6 years old, with soft dark brown slightly messy hair, large warm brown eyes, rosy cheeks, and a gentle curious smile. He wears simple blue overalls over a light cream shirt and small brown shoes. His design should be cute, wholesome, friendly, and easy for young children to recognise. His best friend is a small fluffy white rabbit with long floppy ears, large warm brown eyes, soft pink inner ears, rosy cheeks, and a sweet friendly expression. The rabbit should have a small distinctive accessory that makes it memorable, but keep the design simple. Create both characters in a charming modern children's storybook animation style, soft rounded shapes, clean expressive features, warm pastel colours, polished 3D/2D animated look, simple details, consistent proportions, high-quality character design. Show the full bodies of both characters standing side by side, on a clean simple background, with no text, no logo, no watermark. The characters must look original and suitable for a long-running educational YouTube series for children aged 4-7.