Color Zoo by Lois Elhert is one of our favorite books and I love how it helps kids work on their shapes and colors. The author makes fun animals using simple shapes for their various face features. As you turn the pages, it takes a large shape away to reveal a new animal.
We made our own color zoo in class using a variety of shapes in a variety of sizes. I printed a picture of each student's favorite animal and we looked at the face to talk about what shape the ears, eyes, nose, and face were. Then the students choose the right shapes to make each animal face.