Cost - Yahoo! 360° is totally free. All of it.
Parents Permission Policy - There is no age restriction to use Yahoo! 360°. You can create adult sites if you want to but you need to make them restricted. There are restrictions on how old you need to be to access adult level Web sites.
Profile Page - Add a little about yourself to your profile page. You get 250 characters to say something. Then you can list 4 places that you have lived. If you want you can list the homepage of another of your Web sites, companies and schools you've worked for, languages you speak and a favorite quote. Also tell people about the things that interest you.
Have some RSS feeds you like to read and want to add them to your page, it's easy on your Yahoo! 360° page. You can write reviews on products, businesses and services and add them to your Yahoo! 360° page too.
Add photos and a photostream to your Yahoo! 360° profile page. Your friends list and groups will be there too. Your Yahoo! 360° blog shows right on your Yahoo! 360° profile page. Also share your favorite music using LAUNCHcast.
Photos - Add photos to your profile page and a photostream so people can click through and look at your photos. Create whole photo albums for your Yahoo! 360° profile using the photo album tool they offer or by using Flickr. Flickr is an online photo album service offered through Yahoo!.
Blog - Yahoo! 360° has a blog. Your blog shows right on your Yahoo! 360° profile page so everyone can read it. Using this Yahoo! 360° blog is very easy.
Advanced Design - You can add your own graphics to your Yahoo! 360° profile page if you want to use something different than what the Yahoo! 360° themes have to offer. I could not find a way for you to create your own theme though.