The core of my hobbies is learning how something is made or done. I learned to bake bread and sourdough by making tons of loaves. I learned to make my own beer. 3d printing is my peek into manufacturing industrially even though its a mere taste. I do meal prep to understand packaging and distribution.
I wouldn't say it's fun, most of the time, but it is incredibly satisfying and fulfilling.
How? Why? What? Never stop asking.