It's the lightweight, spongy modeling material that sticks to itself, but not your hands! Non-crumbling formula is easy to air-dry for saving your projects. Ideal for a wide range of hands-on learning projects and sculpting activities. 2 lb Bucket—Includes four packages, 8 oz each. Clay/Pottery Type: Modeling; Color(s): Assorted Primary; Age Recommendation: Ages 5 and Up; Assortment: Blue; Red; White; Yellow.