To ensure the lesson works as described, do the following steps before beginning:

1. Make sure you’ve done the steps in Preparing for the Lesson.
2. Open the scene file named FireTruck.mb.

   This file can be found in the Getting Started directory that you set as your Maya project:

   Getting Started/Assets/Firetruck.mb

   The scene contains a model of a fire truck split into various pieces such as the body, axles, and doors.