Don't judge a penguin by the color of his skin. Not a bad message for today's toddlers. (Or grownups.) Ummmm. (Or humans with serious implicit bias.)
The name of this book's hero, "Blue Penguin," gives us a clue. This penguin looks different. His fellow penguins abandon him for that reason.
Yet Blue Penguin winds up singing, to bring joy to others. Eventually his fellow penguins accept him.
RATING THIS PICTURE BOOK
The intended readers will no doubt find this a lovely fable. About friendship!
On that basis, I'll give this fantasy tale FIVE STARS.
As for my personal thoughts on this book, which I strongly disliked, see COMMENTS below.