Frozen's Elsa and Tony Award-winner Idina Menzel, along with acclaimed writer and teacher Cara Mentzel, present a lyrical picture book about a proud sister learning to find her own way. Cara Lee is a proud mouse. She is proud of her big sister Dee. She is proud of her specially decorated journal. And now she's proud to become what she's always wanted to be: a student. But her first day of school is different than she imagined...