My (very-soon-to-be) four year old son asks "Pappa, what's a Walkie-Talkie?"
He has been studying a small piece of lego that appeared in a set he just got. Having just asked what it was, and still not understanding, he asks more questions.
After two or three more answers ("It is a radio", "It lets two people talk to each other", "It uses batteries and radio waves", ...) he ponders for a moment.
Then insight strikes, "Oh! It's like a cell phone."
"Yes, exactly, it's like a cell phone." (I wince internally. How can I explain that cellphones are thousand of times more complex. How they depend on cellular infra structure, transmission towers, computers. How they work across the world, while walkie-talkies sometimes have problems reaching across the block.) "Yes" I say. "Just like a cell phone."
I feel very old.
Then he looks at me with a worried look. "They are not real, are they, pappa?"
"No, they are real."
Looking at his eyes I can tell that he isn't quite sure he believes me. Why use this clumsy device when you can just use the phone? I don't even think he realizes that some phones uses wires, as all we have are wireless handsets and cell phones, except for a base-station in the kitchen.
Some day I will have to explain it to him that once upon a time, just like there was a time when there was only mail, no email, there was a time when all phones had wires...
Until then I just sit here and feel old.