Whimsical AI Story Illustrations

I have a nine-page picture book for children aged 3-5. I drafted the art myself with AI tools, but the results feel flat and inconsistent. I need each illustration redone—still generated or heavily refined with AI—so they truly sparkle for a preschool audience... (Budget: $750 - $1500 USD, Jobs: AI Art Creation, AI Content Creation, AI Design, AI Image Generation, Caricature & Cartoons, Concept Art, Graphic Design, Illustration, Illustrator)