Development of Creative Commons licenses

[Andres Monroy-Hernandez <andresmh AT media.mit.edu>]

Dear list members,

We have created a new programming language called Scratch that lets kids 
easily create animated stories, video games or interactive art. We also 
created a website where kids can share their creations with one another. 
The source code for all projects is always available under the Creative 
Commons Attribution-ShareAlike License.

Each project page has a "Some rights reserved line" statement which 
links to a kid-friendly description of our CC license:
http://scratch.mit.edu/pages/license

This is how a project page looks like:
http://scratch.mit.edu/projects/HazelleafKitty/15115


I have some questions:
1. What do you think of the kid-friendly license?
2. Do you know of other projects that let kids create their own content 
and license it?
3. Are kids "allowed" to license their own content?
4. Could you point me to any academic or legal documents that touch upon 
this topic in the context of CC licenses?

Thanks !

--
Andrés
MIT Media Lab