By far the fastest way to get into enjoying Virtual Reality right now is Google Cardboard. Just about every modern Android or Apple phone runs the app and the case is as cheap as $5 dollars. You can get fancier cases for 20- 50 bucks. Most of the apps either keep you in a fixed point or on rails with a few that let you move with directional head turning. I will review some of the apps currently on the market later but for now take a look at what Google is doing here:
Categories
Google Cardboard
Managing the Game 