Can a little sloth quell her fears and fall asleep?At the beginning of this bedtime book, the anthropomorphic mammal is having trouble settling down at night. Sloth is "worked up and worried and wide awake," but she's also fortunate to have a patient, soothing mama. Her mother guides her through a series of breathing and mindfulness techniques to help her calm down and eventually drift off to sleep. Gentle, directive dialogue is aimed at the little sloth, but readers will doubtlessly feel as though Mama is speaking to them, too, inviting them to "breathe in and count to four…and then breathe out for just as long." Perhaps they will also "imagine one of [their] worries" along with Sloth and then imagine that they can "set it free." Toro's illustrations shift from interior scenes of the sloths' treehouse home to night-sky backgrounds that draw focus to the young sloth's imaginings. The bedroom décor in the treehouse scenes is charming, with a tree trunk poking through the floor and a canopy of leaves over the bed. Other details, like the single curler in Mama's fur and patterns on pajama fabric, are delightful.A sweet, calming read. (Picture book. 3-6)