Help with unity grid

I am watching a Unity Tutorial (unity3dstudent.com). In the video, the tutor’s grid is solid (objects don’t fall through it). Not only that, but he has more grid lines and it’s a lot bigger than mine.

I know to get my grid I must deselect “Toggle Skyboxes…”, but the only way to see it is to zoom all the way out to the edge of my view, and I can’t move around it.

Here’s a picture of what I’m looking for:

[8470-screen+shot+2013-03-02+at+7.27.56+am.png|8470]

  • Have every object in the scene 30 Units bigger.

  • Reposizion the objects 30 Units above original position.

These can make your objects in different transform, so then the camera will have to move further away from center of scene, causing the grid to expand