Encouraging preschoolers and young children to use their imagination and creativity is important. It gives them a hobby that they can take up and gives them skills that they can use even when they are older. Dollar bill is made with 75 percent cotton( from cotton listers and from rugs/fabrics) and with 25 percent linen. Wool or yarn is a wonderful material that your kid can use to make different fun crafts. There is No paper that can be made with wool which is a protein fiber till now.