Would anyone have or know where I could get free yarn and or material for a charity project?

We run a craft cl out of the Dorothy Day Center @ Saint Francis Univ. making homemade baby blankets to donate to the Linus project. The Linus Project gives the blankets to terminally ill kids in hospitals. or troubled youth in the detention center or Children in Youth services programs. We are in need of yarn, knitting/crochet supplies and/or material and sewing supplies to continue our work. We would be most grateful for any donations. A tax deductible donation certificate form is available for any interested. Peace and Thanks -The Dorothy Day Center