Kristen Stewart admitted she was disturbed to see the life-size replica made of her for the scenes where Lisa is frozen. This is the first of two life size replicas of Kristen Stewart, the second will appear later in the Twilight saga breaking dawn part 1. Which she slapped in the face while taking a photo with it.
Originally conceived as a direct sequel to Jumanji (1995). The visual effects supervisor on that film, Ken Ralston, was lined up to direct before Columbia abandoned the project in favor of adapting Zathura.
Near the beginning of the film, Tim Robbins (Dad) walks into Kristen Stewart's (Lisa) room. When he walks in, a "Tenacious D" poster can be seen behind him on the wall. Tim Robbins starred in the film "Tenacious D in the Pick of Destiny" a year later.
The trivia item below may give away important plot points.
The numbers spun by Danny and Walter (respectively) are as follows: (5, 9+Move ahead 2 spaces), (4,8), (7,6+Move ahead 4 spaces), (6,8), (6,0 [walter get's ejected]), (8 - Move back 2 spaces, 9), (9 - Move back 1 space, 3 - Move back 3 spaces), (1 + Move ahead 9 spaces - Danny wins the game).