The Cat in the Hat Knows a Lot About That! has 40 half-hour episodes. PBS Kids renewed it for a second season of 20 episodes which premiered on September 10, 2012. A 20 episode third season is currently in development. Each episode features The Cat in the Hat (voiced by Martin Short), who leads neighbours Nick and Sally, the Fish, and Thing One and Thing Two on a variety of adventures in his "Thinga-ma-jigger", a Seussian contraption that can sprout wings, pontoons, booster rockets, change size, and do just about anything else necessary to further the adventure. The adventures are prompted by a question posed by either Nick or Sally
The Cat in the Hat going to have the exciting experience of learning that they "can" read after all." Polly Goodwin of the "Chicago Sunday Tribune" predicted that "The Cat in the Hat" would cause seven- and eight-year-olds to "look with distinct distaste on the drab adventures of standard primer characters". Both Helen E. Walker of "Library Journal" and Emily Maxwell of "The New Yorker" felt that the book would appeal to older children as well as to its target audience of first- and second-graders. The reviewer for "The Bookmark" concurred, writing, "Recommended enthusiastically as a picture book as well as a reader". In contrast,