The Cat in the Hat (TV special) stopped working on Seuss projects also. DePatie and Freleng were credited together as executive producers, while Jones was credited as producer with Seuss (under his actual name). For the next three Dr. Seuss animation specials, Freleng and Seuss (again using his real name) were credited as producers, although separately. DePatie–Freleng animated a new Cat in the Hat Productions logo for this special, which would be used in the next three specials. The pace and rhyming sequences of several of the songs (particularly "Calculatus Eliminatus") led many to believe that they were composed by Sherman, since they closely resemble his earlier
The Cat in the Hat "My Hassle With the First Grade Language", he also told a story of the "three excruciatingly painful weeks" in which he worked on a story about a King Cat and a Queen Cat. However, "queen" was not on the word list, nor did his first grade nephew, Norval, recognize it. So Geisel returned to the work but could then think only of words that started with the letter "q", which did not appear in any word on the list. He then had a similar fascination with the letter "z", which also did not appear in any word on the list.