ruby tutorial

Hi Friends,

Where can I get ruby tutorials that explains OO concepts (I've read the axe
and am still reading the rubyway, but still cannot find samples).

I'd like something that illustrates a hierarchy like:

Town is composed of houses and streets:
   House is composed of:
      Windows
         has design
	   has kind
         location
         has proc open
         has proc close
      Doors
         location
         design
         kind
         madeof
         has proc open
         has proc close
      Rooms
         dimension
         type
      has location
      has type
      has design
      has proc open
      has proc close
   Streets:
	has name
	location
      length
      widthe
      has proc open
      has proc close
      and may have other sub-streets


So I can say:

mytown.myhouse.frontdoor.madeof = "wood" (this means that the frontdoor of
myhouse at mytown is made of wood. I say this since I may have my own other
houses on same or different town).

Problem is, I cannot do it (nuby admits dumb). That is why I'm asking (for
pointers only).

Thank you in advance and sorry for the very nuby request.

kind regards -botp