How much for this wordpress mod

My blog is aimed at young blokes but most of the content is not going to be porn. I do want to add the odd adult post. I din't want this post to be visible until the person clicks to confirm they are over 18(21).

Is there a mod like this or if not how much to code it.

Thanks

 

You could simply make that post as private and ask users to register/login in order to view the post.

 

you can get a coppa function include it, modify the age to 18 and hook to the privacy post check

 

This is a job for ajax and php