Williams and Abrashkin were all the way out at the cutting edge, technology-wise. In their first book, “Danny Dunn and the Anti-Gravity Paint,” Danny and Bullfinch accidentally invent a liquid that causes anything coated with it to rise off the ground. That book was published in 1956, a year before the Soviets launched the first artificial satellite, Sputnik 1, but in Chapter 3 we learn that a similar satellite is already orbiting Earth, and is viewable through a telescope in Bullfinch’s lab. Long story short: the American government uses the paint on a spaceship, which accidentally lifts off while Danny, Joe, Bullfinch, and another scientist are inside it, having a look around. During their voyage, Danny completes an assignment that his teacher, Miss Arnold, has given him as punishment for daydreaming about rockets when he was supposed to be paying attention to her: writing “Space flight is a hundred years away” five hundred times.
Some of the scientific innovations portrayed in the Danny Dunn books are so advanced that they are still in the future—time travel, invisibility, smallification—but others have come into existence more or less as Williams and Abrashkin described them. In “Danny Dunn and the Automatic House,” published in 1965, Danny persuades the university to build what would nowadays be called a smart home; it’s equipped with “the newest developments in electronic control systems,” including a voice-activated door lock, a Roomba-like self-propelled vacuum cleaner, and a bathtub that fills itself with water, adds soap, and announces, “Your bath is ready.” Danny’s mother is skeptical: “Once you start trying to save work by putting in machines, you may find you’re spending all your time taking care of the machines and not getting any fun out of your work. This kitchen is my studio—my laboratory, just like your laboratory, Professor. Would you want an automatic laboratory?”
Bullfinch says that he most certainly would not—but in “Homework Machine” we learn that he has built a computer with similar capabilities. It’s a scaled-down version of two mainframes that Williams and Abrashkin saw, during a visit to I.B.M., while they were researching their book. Bullfinch calls it Miniac: