The document describes the characters and elements of the comic strip featuring Calvin, a six-year-old boy, and his stuffed tiger Hobbes, representing his imagination and growth. It also outlines the supporting characters, including Calvin's parents, his teacher Mrs. Wormwood, classmates like Susie Derkins, and his babysitter Rosalyn, each embodying stereotypical traits and relationships in a middle-class American setting. Key themes include friendship, childhood adventures, and Calvin's playful antics such as calvinball and snow-related activities.