I remember when I was somewhere between 12 and 18 years old (but toward the younger side of that range) thinking "Wouldn't it be cool if computers were linked together somehow and you could access the information on them from anywhere." I have no idea why I was thinking that. I didn't own a computer (no one but the government, corporations, and universities did at the time). But I have this specific memory of thinking that. I was outside playing at our house in Idaho. I, of course, knew of computers, having seen them on TV.
This would have been the early 1970s. Yes, ARPANET had been around since 1969, but the world wide web didn't come around until 1989.
Of course, I had no idea how this could work (or even how computers worked). That was sort of the beauty of it. I didn't know the limitations, either. I just wondered if it could be done.
Have you thought of anything that came to fruition later? Let me know in the comments below.