Found this hidden gem of a pop-up in nonfiction, which has to be the only reason it lasted this long. Stunning!

From the Goodreads description:

"This is a book that truly has to be seen to be appreciated. Each spread features a different shape (square, circle, star, triangle, rectangle) that has been cleverly paper-engineered to form spectacular sculptures. Readers are invited to find and count as many items as they can per spread-shapes within shapes, shapes of differ More...

Throughout this book there are pictures and questions about how many legs should each creature or thing have. It’s a good book for young children who are just learning numbers to practice, because not only can they try to recall what they know about certain creatures but they also can check their predictions in the second portion of the book where the answers are given.

Faith loves the pop-ups in this, they're very intricate.