Ten-year-old inventor Andrew Dubble takes his robot Thudd and his cousin Judy on a spin in his underwater vehicle, the Water Bug, but the trio runs into trouble when they crash into Australia's Great Barrier Reef, leaving them prey to some of the world's most dangerous creatures, and at the mercy of their arch-enemy Soggy Bob Sloggins.
When Uncle Al is kidnapped by Dr. Kron-Tox and sent to prehistoric times, Andrew, his cousin Judy, and Thudd the robot try to use Uncle Al's latest invention, the Time-A-Tron, to rescue him, and learn first-hand about the origins of the universe.
Ten-year-old inventor Andrew Dubble takes his robot Thudd and his cousin Judy on a deep-ocean journey in the Water Bug, but they find themselves in a dangerous situation when the vehicle loses power while passing over the deepest place on Earth.
When Uncle Al is kidnapped by Dr. Kron-Tox and sent to prehistoric times, Andrew, his cousin Judy, and Thudd the robot try to use Uncle Al's latest invention, the Time-A-Tron, to rescue him, and learn first-hand about the origins of the universe.
Andrew, Judy, and Thudd travel in the newly repaired Time-A-Tron to the Ice Age in an effort to rescue Uncle Al, who is stranded somewhere on the frozen tundra, and make it back to the present in time to thwart the evil plans of Doctor Kron-Tox.
While bouncing through Earth's prehistory in a malfunctioning time machine, Andrew, his cousin Judy, and Thudd the robot meet Dr. Kron-Tox's nephew, Beeper, and nearly lose the Time-a-Tron in a tsunami.
Ten-year-old inventor Andrew Dubble takes his robot Thudd and his cousin Judy on a deep-ocean journey in the Water Bug, but they find themselves in a dangerous situation when the vehicle loses power while passing over the deepest place on Earth.
While trying to recover from their accidental underwater adventure, Andrew, his cousin Judy, and Thudd the robot are swallowed by a blue whale, the world's largest creature.
Still reduced to the size of insects, Andrew, Judy, and the robot, Thudd, go to a pond, where they encounter dragonflies, moss animals, and fierce larvae in an attempt to learn why frogs are disappearing throughout the world.
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.
