that, the Cat's son gives his little sister a very stern lecture about proper use of her Thinker-Upper and from that night on, the Cat's daughter sticks to using her Thinker-Upper to only thinking up friendly little furry things. See also The Cat in the Hat, original 1957 book References 1969 short story collections 1969 children's books American picture books Books by Dr. Seuss Books about cats Books about tigers The Cat in the Hat Random House books