The Cat in the Hat (TV special) Mayzie", a special based on a posthumously published Dr. Seuss book. In 1997, a puppet version of the Cat starred in "The Wubbulous World of Dr. Seuss", where he was voiced by Bruce Lanoil and Martin P. Robinson. "The Cat in the Hat Knows a Lot About That!", an educational animated series based on the "Random House Library" series, premiered in September 2010; the Cat is voiced by Martin Short. The production began at Chuck Jones' MGM Animation Studio in the late 1960s after the studio had finished "The Phantom Tollbooth" and another Dr. Seuss special, "Horton Hears a Who!".
The Cat in the Hat read, and Spaulding provided Geisel with a similar list. Geisel later told biographers Judith and Neil Morgan that Spaulding had supplied him with a list of 348 words that every six-year-old should know and insisted that the book's vocabulary be limited to 225 words. However, according to Philip Nel, Geisel gave varying numbers in interviews from 1964 to 1969. He variously claimed that he could use between 200 and 250 words from a list of between 300 and 400; the finished book contains 236 different words. Geisel gave varying accounts of how he conceived of "The Cat in the Hat".