Putting the camera inside the cube to see only the inside of cube throughout the game

I'm new to Unity and I'm trying to invent a game with 3d. I want to put a camera inside the cube object but how is it possible? I've read some forums and they mentioned about Normal. I don't want the camera to see the outside of the cube. I want the camera to be inside the cube, so that the only part that will be seen in my game is the inside of the cube. Is it possible? Please help me. Thank you in advance! Please, please hep me.

 

2 sided shader would work also,
http://forum.unity3d.com/threads/mobile-2-sided-diffuse-shader.136231/#post-924526

its using Cull Off, you could try Cull Front,
http://docs.unity3d.com/Manual/SL-CullAndDepth.html

You can download shader sources here and just add that Cull Front there,
http://unity3d.com/unity/download/archive

 

The cull off source code that you've given, Am I going to put that script in the cube?

 

They are shaders. Make a new shader, and drop the code into it. Then assign the shader to the cube object, in its material area.

 

I know is 2 late to write this but in case someone else has the same problem. Just add "ProBuilder" to your project create the cube you want, and in the "ProBuilder Window" press the "Flip Normals" option!