I want to teach my wife to code...where do I start?

I just got the bright idea of trying to convince my wife to learn coding. Why not, eh?

Here is the rub, it's very foreign to her and she isn't particularly 'tech-savvy'.

I do mostly Ruby and Rails dev, so that's where I am going to start. I have a CS degree, but she doesn't.

Where do I start and how do I progress? There are many things I take for granted, like what an 'int' is, and words are called 'strings' - which are a series of letters, not an actual 'word'.

She has no experience with any of that stuff.

I am thinking of starting with something like TryRuby.org - where she can get immediate gratification, but then supplementing it with some 'theory'.

Thoughts?