Stuff.co.nz is offering a Free AIG Haka 360° Cardboard Headset to the first 5,000 people who sign up. This is a similar product to Google Cardboard which you can use with your phone to see 3D videos. Works with all Android and iPhone phones.
Just saw this in the paper today, so should be plenty of stock.
You can see the headset on AIG's website. Supposedly you can order from AIG's site however it seems to work with US & Australian addresses but not NZ ones.
i can confirm the AIG website works with NZ addresses. I just ordered one