Who’s feeling lucky?
I’ve got an idea!
Now, how does that idea actually become real and go together?
That’s what prototyping is for. So you can mess up a bunch, with minimal consequences, so that you can figure out how something, that doesn’t exist yet, and there’s no manual for, should function. As well as how it should be formed, and, well, while you’re at it, what color(s) it should be.
When I was a kid I made a fort/spaceship out of cardboard and was fully armed with an arsenal of nerf guns and stocked up with snacks for my imaginary journey to some yet-to-be-explored planet or jungle. How did I travel there? In a giant scribbled upon refrigerator box, I connected to my bunk bed of course.