What Do You Do with a Big Idea?

There is a delightful book by Kobi Yamada and illustrated by Mae Besom called "What Do You do with an Idea?"
(check it out HERE). What I love about the book is that the idea is as an egg with legs that can walks around with the main character, nudging him along until he has the confidence to bring the idea into being. 
I have always felt like the really Big Ideas do take on a life of their own. I have learned to pay attention, from their very inception, perhaps just a passing vision, giving the idea space to grow and being careful to listen to its nudges and taps on my shoulder. 
The process is fascinating to me, and most likely different from your process. I think we all find our way with this Big Ideas, sometimes ignoring them completely because we are "too busy". It saddens me to think that as adults, we "grow up" into the notion that entertaining a Big Idea, or submitting to the sheer joy of creative play, is somehow folly and far too frivolous for a normal, responsible, adult to engage in. 
I don't profess to be a normal adult, although I am pretty responsible. Follow me if you dare, and see what can happen if you entertain a Big Idea.

After you click the arrow to play the video, you can expand the video to full screen

Where do you begin? For me, it usually begins in hunter/gatherer mode. I seek out all potential materials and begin feeling my way toward and overall palette or texture or theme.