I'm thinking of getting each of the 3 kids a tablet as their big Christmas gift. But I'm pretty computer ignorant beyond Google. Could someone who is knowledgeable about this stuff give me a rundown on what features I should be looking for? For example, I know that I'll want one that can accomodate a thumb drive, so they can do school projects on their tablet then bring the thumb drive into school. I'm not sure what else I would want. Any brand recommendations in that general price range?