When I was a kid, about 5 years old, I invented the steam engine by observing how the lid of a pot was moving up and down as the water within it boiled.
The fact that someone had observed something like the same thing 200 years earlier makes no difference. I didn’t know that and my invention was entirely new for me.
How about you? If you think about it, didn’t you do similar things some time in your life, particularly when you were young?
What was your invention?