Prepare:

  • cardboard
  • PDF template (download)
  • cutter

Thanks to @nageek’s help, the cardboard box has changed to a beautiful shape!

Cardboard1 Cardboard2 Cardboard3

This is what it ended up looking like:

Cardboard4

Reference

かきのブロマガGoogle Cardboardに合うレンズを100円ショップ等から探す
400円でヘッドマウントディスプレイを作ってみる(Cardboard)
Content (Johan Ku Gold Label 2016)
Where to Get the Lens