This video shows you all you need to project images on your cookies when decorating using a handheld projector as well as how to hook it up to any of the App...
Philips Wireless Picopix Pico Projector - Urban Outfitters
Video proyector. $99 Pop Video accessory turns iPhone into pico projector | iPhone Atlas - CNET Reviews
Are you a movie buff who loves to picnic?! 'Layer' was designed with you in mind, this clever creation, modeled after a lunchbox, makes it easy to watch movies outdoors with this portable projector... READ MORE at Yanko Design !
Text writing with PICO projector. Quick and easy.
Can use instead of a kopykake and less expensive. :) AAXA LED Pico Projector - DLP Hand-held Mini Projector - LED Pocket Projector
The real reason a smartphone doesn't have a built-in projector just yet is because it would make the device really thick. People love their devices to be big, but not thick.
Pocket-Sized HDMI Pico Projector.
MobileCinema i20 by AIPTEK - $125