Fay Pacchioli, 93, still works part-time running a pet supplies store, citing a desire to remain active and have purpose.Several Americans in their 90s work to stay mentally engaged and for financial reasons, with about 36,000 working part-time in the US.Older workers like Pacchioli often find it challenging to let go of their businesses due to financial and identity reasons.James 'Buddy' Hooper, 91, runs a business in Clearwater, Florida, taking inspiration from his parents' work ethic.Dolores Haller, 92, works as a bookkeeper for financial stability, having limited savings but finding happiness in simple living.Lewis Tagliaferre, 92, retired from marketing services, lost investments during the Great Recession, and now focuses on writing and learning.Hooper emphasizes converting time into money, driven by the passion for his business growth and expansion to global markets.Haller highlights the importance of being constructive and useful, staying active by caring for her dog and engaging in leisure activities.Tagliaferre reflects on the loss of friends and purpose upon retiring, channeling his energy into writing, learning, and managing finances.Despite challenges, these 90-year-olds emphasize the value of staying engaged, pursuing passions, and finding fulfillment in work and learning.