Mattel thinks it has the secret to succeeding where so many others have failed in bridging that divide between the virtual and the physical -- and it might be right. While plenty of other toy companies have tried pairing hunks of plastic with apps in the past, Mattel has gone the extra mile, incorporating its recognizable brands and partnering with top tier developers. Later this year the company will launch Apptivity, a line of toys made from conductive plastic that interact with iPad games -- some which you're already quite familiar with, like Cut the Rope, Fruit Ninja and, of course,
