Yarn bombing — covering mundane objects (street signs, stairs, gates, pipes, etc.) with colorful knit and crochet work.

Sounds awesome, right? Do yourself a favor and check out the work of Magda Sayeg and Knitta Please, a group of guerrilla knitters who are doing great things to the dull, urban streets around the world. Here’s a peak at a documentary in the works about the yarn graffiti movement.