Ten-year-old inventor Andrew Dubble, stranded in the past along with his robot Thudd and cousin Judy, must somehow dodge dinosaurs long enough to fix his time machine, and try to rescue Uncle Al who was dropped off in the Ice Age.
The people and objects of a town panic and flee when they see a Tyrannosaurus rex approaching, but they discover that only the bananas have anything to fear from this fruit-eating dinosaur.
Discusses the fossil remains, probable appearance, and possible behavior of the gigantic flesh-eating dinosaurs of the Mesozoic, including Tyrannosaurus rex, Allosaurus, and such lesser known relatives as Acrocanthosaurus and Baryonyx walkeri.