Here's a low-tech way of spicing up your camera phone shots--plastic mustaches. Photopaddles by designer Steven Haulenbeek are made of clear plastic and meant to be placed between your camera phone and your subject to create a humorous effect. Aside from adding a mustache to your lady friend or eyeglasses to your bicycle, other variants let you say no to something or add a thought bubble.
A number of phones provide software to do this, most notably Korean brands Samsung and LG. If you have an iPhone, there's probably an app that does this, too. But the physical nature of this photo manipulation "technique" makes it more ridiculous, and thus possibly more silly fun than a software edit. Our only reservation is the price--$6 for each paddle. Visit the designer's page for more sample photos contributed by Photopaddle users.