When you look at children, what do you see? Joy. Excitement. Life.
What do children do all day? Learn. Experiment. Try new things.
I’m guessing that the latter could be a big cause for the first.
Try it yourself: write a song, make malt, learn a new language, build a guitar. The internet is filled with instructions to learn anything we can think of.
Don’t do it for the results. Do it for joy.