Ahem, I have spent several days reading all the Taxonomy pages in the Drupal site and I asked this question in their support forums, but I can't seem to get the hang of it. I am not a programmer... I just don't understand how to set it up. Please, be so kind as to give another nudge...

I understand how to combine categories, such as girls + size small; I even downloaded the module taxonomy filter to make a visual choice.

But... here is where I get stuck, how do I implement that in the catalog? Or do I have to write my own menu for that, in that case, how do I create it in such a way that the customer gets guided through the three levels?