Is it something that I can install in a computer so a 6-year-old who never heard about programming could use it?
No, not really. Involves installing Python/IDLE and then importing a module. Not difficult, but probably not what you're looking for!
Doesn't python have this built in? Try "import turtle".
The goal is for it to be usable by 6-year-olds who have never heard about programming.
I had the idea to make some sort of easy to use frontend for turtle(you know, with tutorials and built in functions to easily do more advanced stuff), but unfortunately i don't have the time at this moment. The turtle module is really cool, and I've spent some time playing with it. Hope you guys make something cool.