Conservation International Virtual Reality Sweepstakes
http://www.conservation.org/stories/vr/pages/valens-reef.aspx
Prizes are:
5 Grand Prizes: Samsung Gear VR virtual reality headset (ARV: US$99.00) and a Samsung Galaxy S7 smartphone (ARV: $649.00) (voice and data plan not included)
50 First Prizes: Google Cardboard Virtual Reality headset (ARV: US$ 16.99) (smartphone not included)