While I'm pleased you're taking my spur of the moment meme so seriously, I think you're overthinking it. Though it's better than I first thought. There's a fairy tale quality to to the quote ("once upon a time") and there are animals. The yellow lettering suggests a lion's colouring. I like it more and more.
But you must be aware that it was a @bookstodon provocation? Poking a stick at the Kindle crowd. But if it encourages children to read real books, I'd be very happy.