There is a bar named "Camp Nowhere" in North Providence, Rhode Island. It was named and themed after the film
Jessica Alba's on-screen acting debut. She was initially hired as an extra for two weeks, with no lines. Later, she had to fill in for a principal character, and received her first on-screen credit.
Jonathan Jackson's soap opera mother Genie Francis has a small role as Arnold's mother. Arnold's father is played by her real-life husband Jonathan Frakes.
In the early trailers, the make-your-own-omelette scene included the invention of the popcorn omelette. It grew into a ball then exploded sending kids flying out the windows. This scene was cut from the final film and removed from future trailers.
Christopher Lloyd initially disliked the script, but only agreed to appear for extra money as his previous films Angels (1994) and La famiglia Addams 2 (1993) only performed modestly well at the box office. He felt he needed a little more financial security after the tepid box office results of the previous films but only agreed to appear if one of his costars from the "Back to the Future" trilogy had a supporting role. This is why Tom Wilson who played Biff in Ritorno al futuro (1985) appears as Lt. Hendrix in this film.