Multiple page data on one page.

I have to creat a Page in wordpress that will show the contents of its children page all on one page.
Or the pages can be added based on a catagory. What I have to show would look like this:
http://eyelasikaustin.nuartisan.net/surgeons.html

I don’t know what to call this action nor do I know how to make this happen.
I could really use some help.
-Jason