I had a hard time figuring out how to use my dad's record player and 8 track player when I was a kid. (and I got in plenty of trouble for thinking his records were Frisbees.) I'm sure that most people who bought the original ipod had to pull out the instructions to figure out how to use it as well. We will always look back at technology and laugh at it's simplicity.
When I was a kid we couldn't afford a television so my dad and I used to listen to the boxing championships on the radio. I remember always asking my dad how voices could be heard on the radio. He couldn't tell me and I still don't know.