Baby bats hang upside down. Baby opossums climb on mom's back! In this book, these nocturnal babies compete for the title of cutest critter. Leveled text for emerging readers shares the animals' key body parts and behaviors. Adorable, labeled photos reinforce the text and help readers identify changes as the babies grow. The book concludes with a side-by-side comparison. Readers can also vote on which baby is cuter!