Get a Google Cardboard VR kit for $26.99 shipped
Both versions come with everything you need (except the phone) to experience Google-style VR: the cardboard housing (laser-cut to Google's specs), two 25mm glass lenses, magnets, Velcro, a rubber band, and even an NFC tag (which Google designates... According to Google, Cardboard works with "most modern Android phones," but only about half a dozen models (including the Galaxy S4 /S5, Nexus 4 /5, and Moto X) have been tested by Google and designated "fully compatible. I haven't tried Google Cardboard myself, but from what I understand, it's pretty cool. Unofficial Cardboard also notes that the maximum screen size for this kit is 5. 1 inches, though they're designing kits for larger phones/phablets. Just one question remains: Is your phone compatible. (FYI, the lenses alone are selling for about $15 on eBay. And the magnets and other items will likely run you at least $10 more.