Help: menu children as node content

Hi all,

I have a question: I need to put in a page's content the PHP code for all the children of a menu item.

For example, if I have the following menu structure:

Item 1
|_ Item 1.1
|_ Item 1.2

Item 2
|_ Item 2.1
|_ Item 2.2
|_ Item 2.3
|_ Item 2.4

Item 3
|_ Item 3.1
|_ Item 3.2
|_ Item 3.3

how can I access all the children of Item 2 so that I can print them in any style I want to a new page content?
I think the menus are array structures, but my PHP knowledge is very limited so in the menu module I cannot find nothing useful.

Thank you.

Lubli