Anna and Sarah Levinson were just 14 and 18 when they brewed their first batch of homemade nail polish and began peddling it into local boutiques. Today, their ripe brand of cosmetics is carried by retailers from Nordstrom to Urban Outfitters. John Magennis was only 14 when he started his Web design company Internet Exposer. In just three years his after-school hobby grew into a 500,000 a year business. Using modern and historical business whiz kids as examples, How to Be a Teenage Millionaire teaches enterprising adolescents everything they need to know to become teenage entrepreneurs. Easy-to-Follow worksheets cover every aspect of starting a business, from choosing a name, to advertising to keeping records. Up-close-and-personal interviews with 17 teen entrepreneurs offer real-life examples that will both encourage and inspire. How to Be a Teenage Millionaire even features a bonus section highlighting "21 Cool Businesses for Teens," complete with great business ideas and step-by-step instructions for getting started.