https://www.penguinrandomhouse.com/books/667017/moon-a-peek-through-board-book-by-britta-teckentrup/
Moon: A Peek-Through Board Book by Britta Teckentrup: 9780593372395 | PenguinRandomHouse.com: Books
From the popular series that launched with Tree: A Peek-Through Picture Book comes a book with peek-through holes that show the moon's different phases...