Displaying all products including subcategory

[artezan]

Hi,
I want when you click on a category it shows all the products in the category and sub category, whilst also opening up the sub category list in the navigation so that if users want to filter through the main category they can.
Is this possible?
My site is http://www.artezan.com.au - I want to combine more categories and also if you look at the top category Hand dyed yarn some users don't want to have to use sub categories (they find two clicks too much work!) but others like the sub categories rather than trawling through pages of yarns they might not be looking for.
Any help greatly appreciated.
Thanks
Zan

[artezan]

I've worked out that you can do it by having all the products in the top level category and then having them also linked to the lower level subcategory.
Is this the only way or is there something to click that will display all the sub category products when clicking on the category (before I spend hours and hours reorganising all my stock, lol).

[artezan]

OK not sure if the idea above works - I moved one category (jewellery) into another (bookmarks) and it displayed all the bookmarks and the link to jewellery - so thought great create a category for bookmarks - link all the bookmarks also to the sub category and that would work -but got an error
Error: Category has Products!

While this can be done temporarily to build your Categories ... Categories hold either Products or Categories but never both!

So assuming it can't be done that way

[stevesh]

That's right - you can't have both products and subcategories in a category.

[artezan]

That's right - you can't have both products and subcategories in a category.

Yep I worked that out (though it was working fine with both in there, lol).
But so my original question still stands (that was me trying to find a solution to my problem)

Is it possible to display the products in all the sub categories when you click on a top category link?

[artezan]

Still not worked out the answer to this question.
Any help please?