> -file permissions, users, and processes on Linux.

Available from most GUI file browser.

> -environmental variables

Available on GUI.

> -package management

Synaptic, or some package management GUI.

> -what a daemon is

There's GUI for Service management.

> -possibly how to use a "real" editor such as emacs or vim

I didn't Emacs and Vim does not have GUI version.

> More importantly, this kids will never be afraid on the command line

That's only important if you value being able to use command line, it's circular reasoning.