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DALLAS (CBSDFW.COM) – With wind chills that make the temperature feel like it’s in the 20’s, you wouldn’t want to be outside long without something to cover your ears. That is the very reason why a North Texas group is leaving surprises – that are warming head and hearts.

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To the average passerby, it may look like a prank of some sort. There are scarves and knitted hats on wrought iron fences, and wrapped around trees.

The people doing it call themselves Yarn Bombers and they say the display is no joke and it’s free to those in need.

Frigid temperatures met their match on this chilly Dallas night.

Armed with bags of yarn, scissors, and gloves, a group of women prepared to go to battle with their biggest enemy – the cold.

“Yeah. Bomb it,” one woman encouraged others, explaining, “Bomb it is a term graffiti artists use.”

“It’s kind of ‘granny graffiti.’ It’s a little different and doesn’t hurt anything.”

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Sally Ackerman and her comrade Ronda Van Dyk are on a mission to warm up those less fortunate. “It is personal,” said one of the women referring to the scarves and hats. “It’s handmade. It’s made with love.”

They tie scarves, hats and other knitted goods right out in the open on trees and fences — hitting neighborhoods they know can use it.

“If you’re walking by and see scarves hanging on trees and there’s any doubt they’re up for grabs the Yarn Bombers have left their calling card letting you know, if you need one, help yourself.

One by one, the items find homes with folks like Johnnie Todd. The Dallas woman said, “You know when you don’t have something, you appreciate it a little bit more.”

Recently homeless, Todd now lives at a senior public housing area. “Every time I think about this [being homeless], I’ll think about this.”

It’s a victory for the Yarn Bombers who are warming up one heart at time. “Dallas is a community and we need to take care of each other. That’s what communities do!”

With the help of several other volunteers, the Yarn Bombers say they’ve given out nearly 500 knitted items in the past few days.

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