Ahh. Alot of people recommend the guide but I personally would start with the real world. Explain to him what object oriented programming is. The concept would then help prepare him for his learning.

Then I would direct him to some of the beginner tutorials that can be found on this site.

As a programmer he also can't be afraid of study. And if he really wants to take it seriously.. maybe invest in a few books here and there on programming theory?

But nothing beats starting at the basics and building on knowledge.