"A lively cover illustration featuring Cow Boy, a cheerful young boy in a cowboy

"A lively cover illustration featuring Cow Boy, a cheerful young boy in a cowboy hat, a plaid shirt, denim jeans, and sturdy boots, standing proudly next to his playful horse named Star. The backdrop is a sunny, open prairie with a clear blue sky, green grass, and a few fluffy clouds. The title 'Cow Boy's Big Adventure' is prominently displayed at the top in a fun, child-friendly font. At the bottom reads 'Written by [Your Name]' in a smaller, whimsical font."