You can turn your iPhone into a hologram projector, and it's surprisingly easy to do. Seriously. And it's frakking cool! All you need is an old CD jewel case, a sharp knife, a piece of graph paper for a template, and some tape. You'll need some videos, like those found in a couple collections on YouTube, to show off your awesome iPhone hologram projector. Now all we need is the message R2 played for Obi Wan Kenobi. Some one get on that.
Check It Out: How to Turn Your iPhone into a Hologram Projector