App: Use the Android and iOS WOW! Stuff app to create the magical effects and save your images and videos. Harry Potter: Get a Harry Potter invisibility cloak kit. Easy to use: Once the app is installed, simply follow the on-screen prompts, and get set to re-enact your favourite scenes from the films. Clever technology: Uses green screen technology to help you appear invisible when shown through your phone app. Accessories: Includes a 44-inch length cape and a phone stand for perfect results. Gift idea: A must-have for any Potterhead, at any age! Harry Potter Junior Invisibility Cloak | Green | Living Social