just ask them to put a finger on the scanner and they will not be able to open the gates. Now put your finger, and you will access it easily. Check their reaction, WOW!! how? the trick is done by a magic hidden button in the app screen, just tap on the flashing red button once, and you will allow access. tap it again, and access is denied. Now updated with amazing visual effects, with cool sounds, it's even more stunning than before. works great on both your iPhone, and iPad. visuals are optimized for all screen sizes. Important note: This is not a real security application. it is mainly meant for entertainment.