How to build a countrywide AI strategy? Finland is turning its seniors into evangelists.

In many ways, Hely Lyly is your typical grandma. She's retired, sings in a chorus, takes fitness classes, participates in a book club and spends a good chunk of her day taking care of her grandchildren. These days, though, Lyly, 68, has a new gig -- as an artificial intelligence evangelist. "AI is now my new hobby," Lyly said, chuckling. Lyly is one of nearly 100 senior volunteers mentoring their peers on the fundamentals of AI.