How to prepare your scene to build and run?

There is nothing in my scene to tick the box in build settings. How to I get my scene to work so I can walk through my scene an an IOS devise to see how its looking?

PLEASE HELP

I'm an animation student and it's crutual to my project that I'm able to present to the markers a scene they can walk through but don't need Unity to do so.

Thnx