Worm is thrilled when it's his turn to take care of the class pet, Nat the Gnat. But everything goes wrong when he leaves the lid of Nat's tank open. Can Worm make sure the class pet returns safe and sound before Mrs. Mulch finds out? This all-new, original I Can Read story captures the fun of the #1 New York Times bestselling Diary of a Worm picture book series by Doreen Cronin and Harry Bliss, and will leave beginning readers wiggling for more! This Level 1 I Can Read book is perfect for children learning to sound out words and sentences.