 They say they can hide up to six people and it uses precision engineered lens array to literally bend light. It works with grass, foliage, sand and sky. And if you look at some of the videos online about it, it's like they put up this, I guess, panel in front of people and then they truly do disappear. I know that every Harry Potter fan would want one of these right now. But speaking of being invisible, here's a joke that you can tell the kids.