As a kid, I was less interested in the physical tinkering than thinking about what we would now call the physics, as opposed to the engineering.
I'd rather lose my own money than someone else's.
My father spent his entire early career as an illustrator for comic books: EC Comics like 'Tales from the Crypt' and 'Creepshow,' then moving on to such magazines as 'Mad' and 'Weird Science.'
Thinking is my hobby. But sometimes you get to where you're stuck and you can't figure it out, so you just go work on another project. I always have multiple projects.
Innovation is so hard and so frustrating; it takes the intersections of people with courage, vision, and resources.