Thomas hates to go to bed. And trying to get him to sleep is making his mommy tired! Every night, Thomas's mommy reads him his favorite book about Mama Bear and her three little bears. But one night, something magical happens. Mama Bear and Thomas's mommy trade places! The more time Thomas spends with Mama Bear, the more he wants his mommy back--and soon! Sensitively told with a dash of silliness, this picture-book fantasy combines bedtime, bears, and the unconditional love between a boy and his mother.