I was 7 and got a TI-99/4A. I rocked it out by saving and restoring programs to cassette tape. You read that right, cassette tape.
Cue Monty Python sketch: http://www.youtube.com/watch?v=13JK5kChbRw
I remember wishing I had an Atari 800, which had 64k of RAM and a real keyboard!
I was 16, but that was 1982. No intertubes. No printer. No RS-232. Cassette tapes.