The baby's name, Pubert, was the name originally suggested (and rejected) for Pugsley by Charles Addams when he was asked by the producers of "The Addams Family" (1964) to name the hitherto unnamed characters in his cartoons.
Carol Kane, who plays Grandmama, is almost a year younger than Anjelica Huston, who plays her daughter, Morticia Addams.
David Krumholtz's character says at one point he has every card for his Serial Killer Card Collections "except Jack the Ripper and that Zodiac Guy." Jack the Ripper and The Zodiac Killer are the real world's most famous uncaught serial killers.
In the TV series, "The Addams Family" (1964), Fester is Morticia's uncle. In the films, however, Fester is Gomez's brother.
The book that Joel Glicker (David Krumholtz) is holding when he enters the Harmony Hut only for it to be taken away is Stephen Hawking's "A Brief History of Time".
Wednesday bitterly quips that "Chippewa" in Camp Chippewa means "orphan". This is pure sarcasm; Chippewa is actually a form of the name Ojibwa (a Native American nation), the original meaning of which is unknown.
After Fester gets his "makeover", his clothing and hairstyle closely resemble those of mad scientist Dr. Janos Rukh, the character played by Boris Karloff in The Invisible Ray (1936).
Michael Jackson was signed on to write and perform a song for the film's soundtrack and to promote it with a video. Although he was able to finish the song, contractual difficulties coupled with the child molestation allegations made against Jackson resulted in the song being dropped from the soundtrack, and the video was never filmed. The song, "Is It Scary," was later included on Jackson's 1997 'Blood on the Dance Floor: HIStory in the Mix' album and was also used in his short film '_Ghosts (1997/I)_'.