The evil Dr. Kron-Tox has kidnapped Uncle Al and whisked him away in his time machine Luckily, Andrew has a time machine of his own. But like most of Andrew's inventions, the Time-a-Tron doesn't work quite right. It tumbles Andrew, Judy, and Thudd back to the very beginning of the universe Will they regain control of the Time-a-Tron in time to save Uncle Al . . . and themselves? J. C. Greenburg is the author of many books for young people in the library...