I guess this is probably possible using the API now. Especially since the pages.get_meta method allows us to retrieve pages by their parent.

I think, the question is recurring every year - could be we need a "print" page with the sequence of the pages to be printed. the "parenting" alone will not show the pages in their correct sequence ( by title) .
New community question:
http://community.wikidot.com/forum/t-417733/print-off-all-pages#post-1317398