[Nadya]

>I wouldn't get angry with them, but I would certainly blame them for thinking something is possible which a small child should be able to tell is not.

Your domain experience is showing. ;) A small child doubtfully knows what pixels are, how computers represent data, how an image is actually displayed, and why you can make them smaller with minimal (meaningful) data loss but you cannot make them larger.

That part confuses lots of people. From children to adults to my grandparents.

Also photo restoration is black magic to some people - and a joy to my heart when I get the opportunity to restore a photo for someone.

[andreyf]

Nah. I'm pretty sure I could have figured out that zooming in makes things fuzzy, just like if you hold it close to your face it doesn't any detail to a photo, at age 7 or so.

Photo restoration is more art than magic, assuming you're more or less drawing in the missing pieces.