Macaulay Culkin and Elijah Wood became very close friends during production, and remain so to this day.
The cigarette that Mark and Henry smoke was a tube filled with dried parsley and lettuce leaves.
Richard and Connie are played by Macaulay Culkin's real-life brother, Rory Culkin, and sister, Quinn Culkin.
Jesse Bradford was originally slated to play Henry. Macaulay Culkin's father wanted his son to star, saying he would pull Macaulay out of Home Alone 2: Lost in New York (1992) if he wasn't cast in this movie. Fox agreed due to Macaulay's bankability.
In 1988, Michael Klesic was cast as Henry Evans. The film was soon after put on hold due to a lack of funding. A few years later, the original child actors had grown too old for their roles, and Jesse Bradford was cast as Henry. The project was shelved again and again, and the actors outgrew their characters. The project was re-cast again, and finally shot and released in 1993.