Design a colorful children's coloring book cover featuring a playful and happy cartoon bear, 'Bella the Ballerina Bear,' holding a crayon in one paw and pointing toward a large, vibrant letter 'A.' Around Bella, scatter different colorful alphabet letters, each with a small matching object or animal (e.g., 'A' with an apple, 'B' with a butterfly). At the top, the title 'Color & Learn: The Alphabet Adventure!' should be displayed in large, bold, rounded letters, each letter in a different bright color (reds, blues, yellows, greens). Add a light sprinkling of doodles, like stars and rainbows, above the title. At the bottom of the cover, in a playful font, include the tagline 'Discover Letters and Colors on a Fun-Filled Journey!' A crayon border on both sides adds decorative elements, featuring paint splashes, balloons, and smiley faces. The bottom right corner should have a small 'peeled back' section that reveals a black-and-white coloring area with the words 'Start Coloring Here!'