by Mem Fox
This is the quintessential calming, nature-themed bedtime story. The entire book is a soft, rhyming lullaby as animal mothers gently tuck their little ones into bed. The repetitive, lulling text ('It's time for bed, little...') is the perfect 'calming sound' to read aloud, and the cozy illustrations of sleepy animals will soothe any three-year-old.