How Does a Butterfly Grow?will entertain and educate preschoolers. They’ll love finding out about each life cycle stage of the swallowtail butterfly, as they follow the fascinating pictures and listen to the fun and friendly text. Close-up photos show the mommy swallowtail laying her eggs, the tiny caterpillar hatching and growing, and the pretty butterfly emerging from its chrysalis. The fully grown swallowtail’s scaly, brightly patterned wings lift up from the page as fluttery flaps, and more flaps reveal three other caterpillars transforming into incredible butterflies and an amazing moth. Kids will also learn other butterfly facts, such as how they feed, how they spread pollen, and how they are similar and different to moths.