Six scenes were filmed but cut from the North American release of the film. These include scenes in which (1) Timmy's father urges the kids to play outside before leaving, (2) the kids enter the lab, (3) the Rockies make a prolonged visit to Saur City, (4) the Rockies have an extended audience with Mr. Big during which Bear is incinerated, (5) the Rockies make an extended entrance into the Tar Town bar, and (6) Jamie hoodwinks the prison guards in Mr. Big's tower.
In his blog, Greg Aronowitz claims that he originally designed the dinosaurs as lankier and younger-looking - "more like teenagers, with a kind of Grease (1978) feel" - before settling for a "bulkier and older looking" design.
Another cut scene from the domestic release featured Timmy's mom and dad at the their convention with a roomful of scientists all holding oranges in wonder after a successful teleportation exercise. Mom is on the phone trying to contact Timmy while Dad basks in the glow of his success. The funny scene was one of the director's favorites.