Education can be fun for the right people who appreciate it. I think it is also more fun for adults than it is for kids because they are more interested in playing games and hanging out with friends. Once you get older and find what drives you though it is super fun.
Humans seek answers to questions and thirst for specific knowledge. Education, formal or informal, helps us understand the world around us, see more opportunities, and allows us to navigate confidently toward the goals we want to achieve. The fun of education is getting what you want out of life because you learned something new.