The poem ‘What is in the mailbox' revolves around a young child who always sees her parents getting letters regularly. After that, she decides to write letters to her friends and known persons in the hope of getting replies for the same. You can check out more answers to the book questions of the poem ‘What is in the mailbox' by clicking on the link and downloading PDF solutions. Vedantu offers comprehensive solutions chapter-wise that makes learning so much easier and fun for students.