"Frindle" is a children's novel written by Andrew Clements that tells the story of a clever fifth-grader named Nick Allen. Nick decides to create a new word for a pen, calling it a "frindle." His playful idea quickly spreads throughout his school and community, leading to unexpected consequences. As the term gains popularity, it attracts the attention of Mrs. Granger, Nick's strict language arts teacher, who believes in the importance of traditional language. The story explores themes of creativity, the power of words, and the impact of individual actions on society.