For about half the price of a Nexus 7, you get built-in 3G support on still a quad-core ARM Cortex-A7 with good 1280x800 IPS LCD. 1gb ram, 4-6 hours of video playback. The price is just $120 in bulk. The device also comes in multiple colors.
Next Generation Communications Contact information (please only contact them if you are serious about buying a bulk of at least 1000 units) (please tell them you watched the video):