A few years ago, graphic designer Grey Jay was asked by a company to create a Photoshop action that would emulate a “toy camera” look for photos. He came up with an action he calls the “Holgarizer” and, after some tweaking and adjusting, has made it freely available to the public. If a messy cross-processed look is what you’re after, Jay’s filter does the job. You can download the ZIP file here.
Holgarizer by Grey Jay [Equal and Opposite]