Doonesbury by Garry Trudeau for August 28, 1975
Man: Been a pretty big day for us, hasn't it, kiddo? Kim: Big Mac! Man: Yup! And "Big Mac" is just the beginning, princess! Pretty soon you'll know the names of the toys and animals and every color in the rainbow! Your daddy's real proud of you, know that? Just as proud as can be! Good night, sweetheart. Kim: Hold the pickle!