Finding Free Yarn Donations for My Ministry?

I am a missionary, for an organization called Dirty Vagabond Ministries. I work in North Carolina with high school aged kids who live in the poorest areas of the city. Several of the girls I work with have expressed an interest in wanting to learn how to knit and crochet.

The ministry I work for does not have the money for extra expenses such as crafts, and I often use my own money. As you can imagine, being a missionary I do not make a lot of money, so now I am reaching out to the craft community. I was wondering if anyone knew of some organizations I could reach out to for supplies, such as yarn, knitting needles, and crochet hooks. Thank you for your time and God bless you and your families.

By Sha