Based on Andrew Neiderman's novel by the same name, Pin (1988) is a dark and emotional journey of a family as they navigate Leon's growing relationship with an anatomy dummy. 

SOURCES/INFORMATION

IMDB: https://www.imdb.com/title/tt0095871/ 

Wikipedia: https://en.wikipedia.org/wiki/Pin_(film) 

Starburst Article: https://www.starburstmagazine.com/reviews/dvd-review-pin-1988/#:~:text=Pin%2C%20however%2C%20is%20a%20different,Pin%20is%20talking%20to%20him.