Boy Sees Sister For The First Time, But Then He Makes a Shocking Discovery

What is the device?

“Hmm, yes, this is exactly what we expected,” the large policeman said. “What is it?” Mark’s wife asked, still frightened. The officer explained that even though this device didn’t seem like much on the surface, it was actually an extremely clever device. “This, my friend, is a tiny computer, and it can do a lot of things.”