This is a short video tutorial showing you how to turn your smartphone (sorry, no dumb phones or pagers) into a holographic projector. All you really need are a couple pieces of plastic (you can even cut up a CD case!) and an app (like this one for iPhones and Androids) or a video (like this one) designed to display holographic images on a phone. I just made one out of paper and it didn't work. I am bad at following directions. I scored the lowest possible score on the SAT for using crayons.
Keep going for the video.
Thanks to MintyStale, not the worst gum flavor, but certainly not the best either.