Yarn Bombing

Have you ever heard of this?  I hadn't, but what a positive, neat idea!

Here's what Wikipedia had to say about it:

Yarn bombing, yarnbombing, graffiti knitting, guerrilla knitting, or yarnstorming is a type of graffiti or street art that employs colorful displays of knitted or crocheted cloth rather than paint or chalk. While yarn installations – called yarn bombs or yarnstorms – may last for years, they are considered non-permanent, and, unlike graffiti, can be easily removed if necessary. The practice is believed to have originated in the U.S. with Texas knitters trying to find a creative way to use their leftover and unfinished knitting projects, but it has since spread worldwide.^[1]

While other forms of graffiti may be expressive, decorative, territorial, socio-political commentary, advertising or vandalism, yarn bombing is almost exclusively about reclaiming and personalizing sterile or cold public places.

And here are pictures of some of the more impressive 'yarn bombs'.