Did you know that sloths sleep up to twenty hours a day? Or that they descend from their trees only once a week to go to the bathroom? In this Step 2 Science Reader, kids will learn all about this sleepy, slow-moving mammal. With photos of adorable sloths throughout! 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. Rhyme and rhythmic text paired with picture clues help children decode the story.