Prof. Bullfinch is able to use this altered material to create ISIT (the Invisibility Simulator with Intromittent Transmission), a dragonfly-like probe which could be piloted with a telepresence helmet and gauntlet gloves.

Danny discovers a bully nicknamed "Snitcher" cheating by copying the word list to the school spelling bee and dishonestly winning himself a boombox.

The ISIT is outfitted with a speaker which is subsequently used by Danny as a means to pretend to be the bully's conscience, in order get Snitcher to confess to his father.

The probe's absence is realized which leads to Colonel Twist, the commanding officer of the two guards, to delusively believe the device has been stolen by a foreign power.

[2] According to journalist Clive Thompson, this Danny Dunn book predicted the rise of personal drones, "including the weird, fun, and creepy ways they’ll change society".