I’m reading a book by Lynda Barry “What it is”

My ultimate goal is to get back that creativity I had as a child. I used to have a very active imagination (as a lot of kids do). I would write books, poems, and when I played I was fully in my imaginary world, and I could create a thousand of such worlds on a whim. But then something happened when I grew up. Maybe we are all praised for acting serious and mature so we slowly lose our imagination.

This book seems to be a solution, or a least a part of it.