A young girl named Amy Max starts a lemonade stand to boost people's brains for $1. She uses creative copywriting, images, and design to attract customers. Over time, she tweaks the product offerings and pricing based on customer behavior. 15 years later, Amy has grown her lemonade stand business into a company called Lemon-Aid, where she serves as CEO and employs people in copywriting, advertising, UX, and lean UX roles. The key to their success has been experimentation and teamwork while keeping an eye on the overall business goal.