Are you interested in making some extra cash in your spare time? Whether you want to have the extra money to set it aside in a savings account or to splurge on some of your favorite accessories, there are actually a few fun and interesting ways to bring in more money while having fun. 1. Shop at Thrift Stores and Resell Valuable Items Do you love shopping? If so, your ability to find some trendy and stylish pieces could help you earn a side income.