The story starts with our good friend Pete the Cat rolling in with his new shirt. He loves his shirt because it has "four groovy buttons". As he goes about his day, his buttons fall off one by one. But Pete is not distressed; he remains grateful for the buttons he does have, until the end. In the midst, he realizes that he still has his belly button! That button will be with him forever. All the while through the story, you are learning numbers, subtraction, and how to live life chill as can be.
Pete the cat loves the buttons on his shirt so much that he makes up a song about them, and even as the buttons pop off one by one, he still finds a reason to sing. 150,000 first printing.