Each of the four titles in this nature series features simple text and vibrant illustrations all about creation and growing up. Caterpillar to Butterfly shows how nature can create an insect that begins life in one state, slowly transforming into a beautiful, colorful winged creature. The other titles in this series are Acorn to Oak Tree, Seed to Flower, and Tadpole to Frog, each delightfully illustrating change and how growing up is a wonderful part of life.