I want to get an android phone for my son but I want to restrict the apps that he can download, both pay-for and free apps. There are a number of ways to control the pay-for apps, bit I cant find a way to control the play store for free apps. I basically want the fone to be used as a fone and as an mp3 player, if he got games on it, he would never speak to a human being again. Help much appreciated.