[UPHPU] Objected Oriented question

[Justin Giboney]

I am trying to wrap my head around object oriented programming, but I  
am having a difficult time trying to figure out how to code something  
like this....

A car manufacturing company makes multiple models of cars (like,  
Toyota: Sienna, Tundra, Camry). Each model has a low end, medium end,  
and high end version. Each version has a set of options it can choose  
from.

Here are my thoughts:
There are at least two classes here (car and option), but I don't  
know wether to make subclasses of each of the models. Then do I make  
subclasses of each of the models for low, medium, and high end?

I could create an array in each of the subclasses for each of the  
options available, but what if there are a hundred options?

What if an option provides more options (like, if you get leather  
seats, then you can get them heated if you like)?