I haven't seen any proper nightvision that isn't somewhat bulky... except of course the fictional ones in movies...
I actually saw this exact night vision goggle (Eyeclops; $90) at Toys R Us today. It's made by Jakks Pacific (who make wrestling action figures) and is marketed towards young kids who like spy gear so I can't see this to be too reliable.
HUH, night vision goggles targeted to sell to kids, I don't want to ask how they're going to use it