She eventually transitioned into writing children's books, most notably, Freaky Friday (1972), which was made into a feature film (released 1977) for which Rodgers wrote the screenplay. She later explained, "I had a pleasant talent but not an incredible talent....I was not my father or my son. And you have to abandon all kinds of things." Rodgers' children's books include A Billion for Boris (1974, later republished under the title ESP TV), Summer Switch (1982), and The Rotten Book (1985), and she contributed songs to the landmark children's album Free to Be... You and Me.
Adam Guettel, Rodgers' son by second husband Henry, is a Tony Award-winning musical theatre composer. She has four other surviving children; a fifth child died young. Rodgers is a director of the Rodgers and Hammerstein Organization and a board member of ASCAP. She also served for several years as chairman of the Juilliard School.