The effect is well known, but the method is genius! After some metal bending with spoons, pick up two of the bowls and place them under your eyes and tape them shut. Have an audience member make sure no cracks remain for the possibility of seeing through them. Yet you will be able to do amazing things as if you had nothing covering your eyes such as navigating through a crowded room, write, even read a book. You can perform the effect as soon as you receive the box. It's so simple to do you'll be amazed!