Yarn Bombing. Yarn bombing is also known as yarnstorming, guerrilla knitting, or graffiti knitting. While yarn installations may last for years, they are considered non-permanent, and, unlike graffiti, can be easily removed if necessary. Nonetheless, the practice is still technically illegal, though it is not often prosecuted vigorously. It is believed to have originated in Texas.

(via paintmyworldrainbow)