​     The old man whispered to Trevor. "I'm about to take your hand. Just follow where I lead.​ Do you understand?"

​     "I...uh..."

     "We'll talk later. Do you understand? Yes or no?"

​     "Yes."

​     "Gramps attached a device no bigger than a dime to the back of Trevor's hand. "We're about to turn invisible," he said. "Are you ready?"

​     "Uh...Uh..."

​     "Say 'Bye'," Gramps said, at which point he, indeed, turned invisible.

CONTINUE