Goodnight Moon is a 1947 children's book by Margaret Wise Brown and illustrated by Clement Hurd. The book has remained in print and is recognized as a classic, describing a bunny child's bedtime routine of saying goodnight to every object he can see.
- The book has been read multiple times on Sesame Street. Gina reads it to Miles and Elmo in Episode 2625 (1989). Luis tells it to "baby" Elmo from memory in Episode 3160 (1993). He memorized it because it was the book he'd read to put Gabi to sleep.
- In Episode 3267 (1994), Ruthie shows Goodnight Moon to Zoe as one of the books she might like to read in addition to The Very Quiet Cricket.
- In Episode 3785 (1998), Oscar reads Slimey a different version of the book, including "Goodnight, mud."