Though the plot differs greatly from that of the book on which it is based, the ending of the film is very similar, in which the game is found by two other young children. In the book, the two children who find the game at the end are named Walter and Danny, the main characters from Zathura: A Space Adventure (2005).
In the film, the role of Alan Parrish's father and that of the hunter Van Pelt are played by the same actor (Jonathan Hyde). This may be a reference to Peter Pan, since (in theatre and movie versions) the parts of Captain Hook and Wendy's father are traditionally played by the same actor. (Robin Williams also played the grown up Peter Pan in the movie sequel Hook (1991).)
When Van Pelt enters the gun store, the music playing on the radio has been modified for the Mexican release due to the fact that, at least in the U.S. release, it originally featured Mexico's national anthem. It is an infringement of Mexican law to play the anthem for commercial or mockery situations, deliberately or not, although in the U.S. Territories it is in the public domain.
Although Carl Bentley is shown to have still been an adult when Allen Parrish was a child, David Alan Grier, who plays Carl, is actually four years younger than Robin Williams, who plays the adult Allen.
In the French version (dubbed in Quebec, at least), Judy's line, "I'm sorry, dear, you have the wrong number," which she speaks in a fake English accent, is still in English but is spoken with a regular North American accent. Additionally, the two French girls who hear the game at the very end speak Spanish instead of French.
The music heard on the radio while Van Pelt is in the gun shop (the Mexican national anthem in the US release) is from a Berliner Gramophone disc record performed by Sousa's Band, recorded 7 April 1898.
The fireplace andiron (fireguard) visible in several scenes show a definite resemblance to the National Broadcasting Company (NBC) Peacock logo. It is unknown whether that link is intentional, or if the peacock motif was fashionable at that time.
The Sir-Save-Alot scene was shot in Tsawwassen, BC located at 56th Street & 12th Avenue in what was the Tsawwassen Shoppers Mall. The Sir-Save-ALot store was the old Super Valu store (which was a grocery store before it closed). At the time of filming, the store was vacant, and although the exterior was repaired after the movie was shot, the store never re-opened. The mall has since been redeveloped, with Safeway being the anchor tenant. The Sir-Save-ALot/Super Valu in the old mall was along the west perimeter of the current mall, what is now a parking lot/entranceway.