A real neat demo! I Love Drupal!!
Watch the video and understand -> menus, themes, blocks, views, modules, ubercart store
Video created by Acquia
"Acquia provides commercially supported Drupal distributions, technical support, and value-added network services for Drupal. However, the Drupal project, Drupal.org, and the Drupal Association pre-date and function independently from Acquia. Acquia functions as a member of the community to advance the Drupal technology and promote Drupal adoption. We’re one drop in the Drupal ocean."