One of the biggest surprises at this year's Google I/O was the reveal of Cardboard, a simple virtual reality headset that uses your Android phone. Now you can make one at home.
Its construction calls for some cardboard (obviously), magnets, velcro, a rubber band, and the trickiest part: some Durovis OpenDrive Lens Kits. Google's developer site provides the instructions and links to the aforementioned materials you need to construct your headset. Once it's complete, you just need to download the Cardboard app on the Google Play Store, and you're ready for the virtual world. For the complete list of materials and instructions, hit the link below. Bonus: You can use the cardboard from an extra large pizza.
Cardboard [Google Developers]