Jakks Pacific has some night vision goggles designed for kids 8 years old and older. But, screw the cuter of the commandos - these goggles could be for your adult-sized melon, and they could be used for adult-sized missions.
They cost 80 dollars, and are cheaper versions of the military-spec goggles. They use genuine nightvision technology (albeit scaled back) as opposed to hokey green, glowing lights. You can see about 20 feet, which should be more than enough for in-house adventureing, and you'll be able to buy them this fall from Jakks Pacific.