Instantiate a class

Hi,

I really don't get it. I have a GameObject with 10 childs. Each Child has the same script (name: Bar) attached (the childs are prefabs). The parent has the script Foo attached.

Foo -> parent script Bar -> Child script

Now I want to instantiate Foo within Bar so I can "pass" events like OnMouseDown(); from the child to the parent.

But how? How? ...

Does Unity really create a GameObejct for every little thing? Why the heck does it create a GameObject for scripts? I mean, it's a nice feature that you can attach it and all that but why am I being forced to use it?

There must be a way to just link scripts together without dynamically create gameObject all the time and blast your code.

So, what's the most basic way to instantiate a class which extends MonoBehaviour?

And why do the docs explain what inheritance is but not how it works in Unity? Or am I blind? Oh and I don't want sound rude, I'm just wondering.

Thanks