Surely you must have played with a kaleidoscope at some point in your life. The combination of mirrors and colored beads can yield amazing geometric patterns when pointed at light sources and it's a great example of the principles of reflection. Now you can have the exact same experience on your iPhone, with App Cubby’s KaleidoVid.
This $1 app mimics your classic kaleidoscope: point the iPhone’s camera at anything to yield swirling, hypnotic geometric patterns. Find one you like? Tap the screen and the image freezes. You can then e-mail the image, save it to your phone’s Camera Roll, or even share it via Facebook or Twitter. There’s a gallery of screenshots on the official site showing off some of the most interesting images that the creators and users have come up with.