A Step 2 Step into Reading Science Reader about the life cycle of a butterfly! Full-color photographs give emergent readers an up-close look at each stage of the insect’s life. Originally a read-aloud storybook, The Little Butterfly is now available as an “I can read it myself!” early reader. Step 2 Readers use basic vocabulary and short sentences to tell simple stories, for children who recognize familiar words and can sound out new words with help.