"Hey, Harry," said Ron, as they paid the campground owner for their space after the World Cup. "Did you get any new Chocolate Frog cards?"
"Yeah, I got a couple. I think this one Seamus swapped me might be new, I hadn't seen it before. Want to look?" Harry dug it out of his pocket and handed it to Ron.
"Careful," said Hermione in a low voice. "Don't let anybody see it."
But she was too late. The campground owner's two Muggle children wandered into the room, and saw the tiny moving image on the card. They stared.
"Wow," said one of the Muggles. "Where'd you get that?"
"Uh ..." said Ron. He looked hopelessly at Harry and Hermione.
"It was a birthday present," Hermione interjected smoothly. "Nice, isn't it?"
"Can I have a look?" inquired the Muggle girl.
"No," began Ron, but Hermione took the card and held it out.
"Just be careful not to break it, please," she said. "They're kind of expensive."
"Oooh," said the girl, inspecting it from every angle. "Amazing. How does it work? Is it some kind of computer?"
Hermione shrugged, as casually as possible. "I don't know. But it's pretty, isn't it?"
"Yeah." The girl handed it back. "Well, see you later." She darted off out a side door, and the boy quickly followed. The campground owner waved them off with a vague "Merry Christmas," still disoriented from the Memory Charms.
Once they were safely outside, Ron turned to Hermione. "You shouldn't have let them see that!" he hissed. "You're the one who's always going on about rules – don't you know about the Statute of Secrecy?"
"Sometimes letting a person get a look is better than trying to hide things," said Hermione. "Most people aren't really sharp, so all you have to do is satisfy their immediate curiosity and that's that."
"Why did she think it was a ... whatsit? Confunder?"
"Computer," Harry corrected.
"Whatever. I mean, what's wrong with these Muggles? They can't even tell magic when they see it? I don't get it."
"Simple," said Hermione. "Any sufficiently complex magic is indistinguishable from technology."
Author's Note: RIP, Sir Arthur C. Clarke. 1917-2008.