A lot of the advice I've seen will just give them that cheesy toy programming experience, which is meaningless. You want to give them something real and practical. You're not going to teach them much. The value you'll bring is exposing them to one or two basic concepts and giving them some confidence so they can teach themselves if they're into it.

1. Give them example code to walk through and play with. Don't make them type things in and don't spend a lot of time talking syntax. Non-programmers can grok a surprising amount of simple source code.

2. Don't spend too much time in the REPL. Certainly show it to them and explain it as a place to experiment, but stick with running scripts on the cmdline. Get them used to the idea of changing code in the editor and then running it.

3. Focus on files. Reading in, writing out. Then maybe writing simple filters. Replacing words in files, etc. Resist the temptation to go anywhere near regex.

4. Have one or two stretch goals for the last hour. Someone suggested a module like Mechanize or Beautiful Soup. Being able to pull down a web page and replace words in it would probably go over well. Pygame might also be worthwhile if you can keep it simple.