Bumpety Boo is a strange, car-like creature with a cute yellow body who hatches from a mysterious egg at an automobile factory. When a boy named Ken hears the cries of a newborn and heads to the factory, he meets Bumpety Boo, and the two soon become close friends. Together with Mister the dog, they set off to travel the world. Their trip is full of excitement, but trouble follows them in the form of Doctor Monkey, who wants to get his hands on Bumpety Boo. Told in short episodes across a long run, the adventure pairs a kid with his four-wheeled companion and a world to explore.