Little Critter is a beloved character from the children's book series created by author and illustrator Mercer Mayer. He is a small, anthropomorphic creature that is often depicted as a young, curious, and slightly mischievous character. Little Critter’s stories typically revolve around everyday situations and challenges that children face, such as learning lessons about sharing, responsibility, or dealing with emotions.

He is often portrayed with his family, friends, and various animal companions, and the books highlight themes of personal growth and understanding. Little Critter’s adventures are told in a simple, relatable way, making him a favorite among young readers.