Tauranga residents are being given something to yarn about after a group of ninjas attacked the city with a bomb of woollen creations this week.

A group of women –known as the Ninja Knits – dressed the city's streets in brightly coloured yarn creations, covering trees and concrete cubes downtown.

Brightly covered yarn bombed cubes on The Strand. Photo: Bruce Barnard.

Ninja Knitters install their creations on concrete cubes. Photo: wildandgrace.wordpress.com

The idea of yarn bombing on The Strand was developed from the Greerton Guerilla Knitters – who decorated the trees with their woollen masterpieces in June.

Yarn bomber Emily Mowbray says it is 'another form of street art”.

'(It's) real street art where your identity is suppressed,” says Emily.

'It's coming from a place of wanting to bring some colour in to the city.”

The Ninja Knitters meet at The Incubator arts space once a fortnight on Wednesday to knit or crochet.

The women, aged from 20 to 70, have all contributed in some way to the yarn bombing project that coincides with this week's Arts Festival, stitching woollen creations around the trunks of tree branches.

Emily says the project gives knitting a new name.

'Quite often knitting has connections with older people. But street art has young connotations,” she says.

'It's really pushing the boundaries of what people think should be done with wool.”

As well as colour, Emily says the woollen creations bring a soft touch to the city.

'You get to give a concrete cube a facelift with your wool.”

The yarn bombs are interactive with some providing yarn and knitting needles for people to add their own creations.

The group will now focus on putting their knitting needles together to create a giant flower and vegetable garden for the Tauranga Garden and Arts Festival in November, 2014.

To donate wool or knitting needles to the Ninja Knitters contact Emily on 021662852.