Pearl Paperclay is an economy grade modeling material especially developed for schools. Pearl Paperclay is value priced and a great alternative to instant paper mache or Styrofoam based products. It is made from all natural ingredients; is non-toxic and biodegradable (it carries the Art & Craft Materials Institute AP non-toxic label!). Comes out of the package ready to use (no mixing or kneading required) in a clean white color. Its very soft and fine texture can be sculpted; shaped or molded very easily while moist. After it air dries; it becomes very hard; not spongy. It can be painted or colored with tempera; acrylics or markers making it ideal for kids crafts or classroom projects! This package contains 16 ounces of modeling material. Conforms to ASTM D4236.