* AFIS100Years100Laughs: #42
* AFIS10Top10:
** #10, Fantasy
* {{Defictionalization}}: That computer game Josh plays? [[http://www.bomtoons.com/biggame.html Someone went ahead and made it for real]].
* HeyItsThatGuy: [[ThatSeventiesShow Kitty Forman]] is Miss Patterson, Josh's secretary.
** [[Film/IndependenceDay General Grey]], what are you doing running a toy company?!
** [[Series/{{Weeds}} Celia Hodes]] also hooks up with a man-child.
*** Mr. Walsh from Beverly Hills, 90201 gives Josh his first paycheck.
* TheOtherMarty: Invoked during filming. Reportedly, Penny Marshall had David Moscow perform scenes of the grown-up Josh to help Creator/TomHanks get a handle on a how a kid would behave in an adult setting.
* TheRedStapler: Since its first release, many people have stopped by the FAO Schwartz on Fifth Avenue to play the floor keyboard.
* ThrowItIn: The "Big rap" sung by Josh and Billy is one Creator/TomHanks' son had learned while at summer camp.
** The scene where Josh and Billy shoot Silly String at each other was derived from Hanks, Rushton, and Moscow being left in a room filled with toys.
** At the fancy party with baby ears of corn, Josh' eating the tiny ear as one would a normal one was put in by Hanks.
* TomHanksSyndrome: This movie marks Tom Hanks' transition from a comedic actor to a dramatic actor, even though the movie was part comedy, part drama.
* WhatCouldHaveBeen:
** Creator/RobertDeNiro, Creator/JohnTravolta, Creator/HarrisonFord, Creator/SeanPenn, Dennis Quaid, and Gary Busey were all considered for the role of Josh when he becomes an adult.
** Debra Winger was offered the role of Susan, but she turned it down because she was pregnant at the time. She even recommended Elizabeth Perkins for the part.
** Creator/StevenSpielberg considered directing the film (his sister co-wrote it, after all) but declined as his son had been born and felt he should be closer to him. Creator/RonHoward and Sidney Pollack also turned down the directorial job.
** [[spoiler:The film was originally supposed to end with Josh back in school and meeting a girl named Susan -- who turns out to be the same Susan who Josh met in his time as an adult, and made a wish on the Zoltar machine to become a kid again. This was rejected by test audiences and replaced with the ending where Susan watches as Josh turns back into a kid and walks out of her life.]]