Lovely stuff. One piece of feedback is that the minimal graphic design style looks like it would appeal to adults more than kids.
Thanks, Bevan! Honestly we had this same discussion internally and I thought the same thing initially. The response has been the opposite from the kids we've read the book to, my own kids, as well as stories we've heard from other parents. They actually love the simplicity and the playfulness we achieve purely through typography, shape, and color.
Great to hear, I was only speculating, there's nothing like real testing.