Is there any friendly end user documentation? I couldn't find any in the docs area. I am happy to start writing some, but it would be great to build on some in existence. I am after really basic stuff, layout of the screen, what is a private message...

I am looking to create a walled garden community for my kids and their friends at school. I want to extend it right down to age 4/5 when they are just learning to read and write. It isn't an educational site as such, but I do want it to perhaps help...