Yes,explosion! See if you're in an explosion don't worry! You might be dead, but your phone's screen won't have a scratch XD
So I really wanted to try cardbord, but was too lazy to put it together. Then I found http://www.dodocase.com/products/google-cardboard-vr-goggle-toolkit
I just ordered from oppo mart. I think it will be fine... I hope anyways :P wish me luck!
HERE YOU GO!
Just wanted to report it isn't working with LG G4. I'm running a almost stock version ROM.