The crew built an actual treehouse in the back yard of the house used for the exterior scenes of the Finney's home. The real homeowners liked it so much, they requested that the producers to leave it up after filming.
Fred Wolf and David Spade originally wrote a skit in the '90s for Saturday Night Live (1975) about a child star rampage, spoofing The Silence of the Lambs (1991), for when Macaulay Culkin was hosting, but it was cut. The idea was later pitched for The WB, but they turned it down. It was eventually totally rewritten and turned into this movie, originally written as a dark comedy with more references to drug use by child stars.
EASTER EGG: There are 3 easter eggs on the region one DVD - all are outtakes. "Left" button once on first selection of second page on the Special Features menu; "Left" once on the Commentary selection in the Languages menu; and select "Nucking Futs" by hitting "Down" once while cursor on selection above the line in quotation marks.