Nested Content Types

Hi All,

Could any one please help me to know if there is any module available in Drupal 7 for creating Nested Content Types.

if fruits is a content type,the content for fruits :1.Apples,2.Oranges

When I click on Apples it should show the content for Apples : 1.Gala Apples,2.Criterion Apple

When I click on Oranges it should show the content for Oranges: 1.Navel Oranges,2.Valencia Oranges

when I click on these child content(Gala Apples,Criterion Apple,Navel Oranges,Valencia Oranges)it should open an url which is related to that content

I tried this with Book module but all the content is appearing at once(there is no parent,child relation)and also I could't find how to add the url in book module.When I click on Content types I should only see fruits(not all the child content of this) when I click on fruits then only see Apples,Oranges.. not any other content.

Please let me know if my question is not clear.I will try if I can explain more clearly.

Thanks.