Official Harry Potter Invisibility Cloak One side of the cloak works as a green screen so you can make a video with your phone to create the illusion that you disappear 🫠 . App Download so you can easily create videos. I have this extra one that I never used so letting it go so that someone can have as much fun with it like I did with the others I owned. This is the perfect Halloween give for wizards and witches out there.