This is blogging! A blog (weblog) can be an online diary. It can record thoughts, web links and embedded videos. Most of all, it can allow a user quickly and easily to publish their writing to a potentially infinite audience. To set up your own blog, sign up with www.wordpress.com. There are three main security settings:
totally private (only registered users can see it: you can have up to 30 users for free)
public for reading, but only registered users can comment (or you can prevent comments entirely)
totally public for reading and commenting
Either of the first two would be suitable for children’s use. This is an open blog: only I can write and edit posts, and put up pictures and videos, but anyone can add comments. Please comment on any uses you can see this being put to, or any links to great blog sites you find.
Another similar site is Making the News (http://mtn.e2bn.net) which has been designed for schools: once your school has registered, anyone can write posts or add comments without a password, but the school Making the News administrator (usually the class teacher) vets everything before it goes live. Have a look at the work of children at schools across the South West at http://mtn.e2bn.net/swgfl_central/.
Teachers’ TV has a video on children’s blogging: http://www.teachers.tv/video/167
Here is a document explaining how to use Making the News.