Paint and chalk is so last season! Guerrilla crochet or granny graffiti is a new form of urban vandalism that is taking over cities worldwide. Rather than spray-painting trees, monuments or buildings, these artists bring color and life to neighborhoods with their yarn and knitting needles.

Did yarn bombing artists strike someplace near you? No? Well, it’s only a matter of time before you see crocheted works of art like these in your city: