Orange cartoon bus racing across a glowing rainbow

Create a bright, eye-catching 3D cartoon YouTube thumbnail for a kids' poem titled "🌈🚌 The Rainbow Bus Adventure 🌈🚌". A cheerful bright orange rainbow bus races across a giant glowing rainbow in the sky. Mr. Sunny drives while Emma, Leo, Mia, and Noah wave excitedly from the windows. Sparkles the Rainbow Bird flies overhead leaving rainbow glitter trails. Around the bus are colorful elements from every rainbow color: red apples, orange pumpkins, yellow chicks, green frogs, blue dolphins, indigo stars, and violet butterflies. Huge smiling rainbow, fluffy clouds, magical sparkles, vibrant colors, joyful expressions, ultra-detailed 3D cartoon animation style, Pixar-inspired, colorful lighting, kid-friendly, fun, exciting, high contrast. Large bold colorful title text: "THE RAINBOW BUS ADVENTURE" prominently displayed in the center. 🌈✨🚌