I just bought my kids a couple of first gen N7s (32GB). I've set each of them up with their own google account. I'd like to be able to install apps and movies I've purchased. I know I can just add my google account to their tablets and download them, but I don't necessarily want them to have access to my gmail, youtube, calendar, etc. I'm sure there is a way to do this, but I'm not sure how. Any assistance would be appreciated.