I started with how and where I wanted the book to be read.
My nieces are lucky to have parents that read to them every night, and it's one of my favourite memories too.
I wanted the story to be either a communal or solitary experience equally. Perhaps read as a bedtime story.
As only one person can hold a tablet and two can hold a picture book, the decision was made.
Plus, I think parents are becoming conscious of using digital devices, especially at night. They're too stimulating and getting children to bed is hard enough already.