The Rule of Thirds keychain promises to make you a better photographer -- and hold your keys safe. Made from laser-cut transparent acrylic, this camera-shaped piece comes with an engraved grid with nine equal, 4x6 rectangular portions. The portions split whatever you're looking at into little imaginary frames that, according to the rule of thirds, are integral to the quality of a photo.

This gadget can be useful for learning about composition, and is most suited to hardcore artists and those who are hoping to be. Initially, the keychains were crafted for photographers by photographers, who immediately loved them; they then decided to make the pieces available for others, spreading fundamental knowledge on the art of composition.