1. The original director selected by the producer was Stephen Spielberg, and Spielberg insisted that Harrison Ford play Josh.
2. Tom Hanks is the first choice to play Josh Baskin, but he was unable to take the film because of his starring roles in "Headline Jokes" and "Tianluodiwang". The producer then found Robert De Niro, but he offered a salary of $6 million and the producer could not accept it. Later, Hanks starred in the other two films with a compensation of $2 million.
3. David Moscow was originally going to play Josh not as a teenager but Billy, but because he has no similarities with De Niro, he was able to play Josh.
4. Deborah Wenger was the first person to play Susan, but she was unable to play because of her pregnancy.
5. Robin Williams was also the candidate to play Josh.
6. The scenes around Josh's house were shot at Cliffside Park in New Jersey, and the amusement park was shot at Rye Playground in West County.
7. In order to match the eye color of Tom Hanks, David Moscow wore colored contact lenses.
8. In order for Tom Hanks to learn the behavior of 13-year-old boys, director Penny Marshall asked David Moscow to perform Tom Hanks's play, so that Hanks imitated Moscow's actions.
9. The scenes around Josh's house were shot at Cliffside Park in New Jersey, and the amusement park was shot at Rye Playground in West County.
10. Little Josh turned into a big Josh. When he woke up from his sleep, the size of his underwear was still right.
11. When Josh woke up from sleep, he didn't feel that he had grown taller when he got up. He only felt it when he looked in the mirror.
2. Tom Hanks is the first choice to play Josh Baskin, but he was unable to take the film because of his starring roles in "Headline Jokes" and "Tianluodiwang". The producer then found Robert De Niro, but he offered a salary of $6 million and the producer could not accept it. Later, Hanks starred in the other two films with a compensation of $2 million.
3. David Moscow was originally going to play Josh not as a teenager but Billy, but because he has no similarities with De Niro, he was able to play Josh.
4. Deborah Wenger was the first person to play Susan, but she was unable to play because of her pregnancy.
5. Robin Williams was also the candidate to play Josh.
6. The scenes around Josh's house were shot at Cliffside Park in New Jersey, and the amusement park was shot at Rye Playground in West County.
7. In order to match the eye color of Tom Hanks, David Moscow wore colored contact lenses.
8. In order for Tom Hanks to learn the behavior of 13-year-old boys, director Penny Marshall asked David Moscow to perform Tom Hanks's play, so that Hanks imitated Moscow's actions.
9. The scenes around Josh's house were shot at Cliffside Park in New Jersey, and the amusement park was shot at Rye Playground in West County.
10. Little Josh turned into a big Josh. When he woke up from his sleep, the size of his underwear was still right.
11. When Josh woke up from sleep, he didn't feel that he had grown taller when he got up. He only felt it when he looked in the mirror.
