Displaying categories items among posts

Okay, after a research of a matter, i came to the conclusion.
My post types would either be the category posts with no data (parent containers) or a child posts – standard articles. My template will check if the post does have any children – if not – it will display the post itself, and if yes – it will display gathered bricks (thumbnailed excerpts) of them. Taxonomies do not have anything to do with it.