Follows the adventures of Kristy and the other members of the Baby-sitters Club as they deal with crank calls, uncontrollable two-year-olds, wild pets, and parents who do not always tell the truth.

For the graphic novel based on this book, see [Kristy's Great Idea–Baby-Sitters Club Graphic Novels #1](https://openlibrary.org/works/OL8117947W/Kristy's_Great_Idea_(Baby-Sitters_Club_Graphic_Novels_1).