The concept of symmetry is clearly explained and illustrated on the opening spread. In addition to the usual shapes, there is an image of the Taj Mahal which is a symmetrical building and that adds just a little bit of extra information and reveals how symmetry is meaningful in architecture and does not only occur in nature. Additional descriptions and illustrations teach young readers about a line of symmetry and also note that plants and animals can be symmetrical without being identical as far as patterns or coloration or exact shape. Once a concept is presented the book asks readers thoughtful questions.