Learning can and should be fun. This is not just a moral position, but a scientific one too. One of the many negative things about the misconception that
Rather than fun being a relief from learning, or a distraction from it, for most of our history, before school, learning had to be its own motivation. Brains that learnt well had more offspring, and so learning evolved to be rewarding.
In lots of teaching situations we focus on the right and wrong answers to things, which is a venerable paradigm for learning, but not the only one. There is a less structured, curiosity-driven, paradigm which focusses not on what is absolutely right or wrong, but instead on what is surprising. A problem with rights and wrongs is that, for some people, the pressure of being correct gets in the way of experiencing what actually is.