It\'s been years since I thought of this, but I am training some real juniors soon and need to explain what an object is to someone who doesn\'t know what it is.
B
I would go from Access Levels and Encapsulation and move out from there. Encapsulation is a reasonably simple concept to grasp and has some clear benefits. From there you can talk about abstraction, inheritance and polymorphism quite easily.
As an undergraduate I found Encapsulation to be an good anchoring concept in a quite abstract area.