Here's the link to the Entity Framework 6.0.2 Tools for Visual Studio 2012 & 2013:
http://www.microsoft.com/en-us/download/details.aspx?id=40762#
Edit:
- Right-click on your project, select Add, select New Item...
- Select Data from the left pane, select ADO.NET Entity Data Model, click **Add*
- Select Empty Model and then click Finish
This should bring you to the Entity Data Model Designer where you can drag and drop entities and create relationships.