A new art form involves the unlikely pairing of activism…and knitting!

Urban artists are responsible for putting brightly coloured woolen blankets on street signs, railings and buildings in cities across the world to make a statement.

The art form is called knit graffiti or guerilla knitting and began in Texas in 2005. Now a new book full of guerilla knitting patterns inspired by the works called Yarn Bombing has just been released!