Playing with Motion Sand is a magical and mesmerizing experience, giving a moment of relaxation for both young and old. Motion Sand is based on 98 percent pure sand. The secret to the movement is our patented technology hidden within the binder. Motion Sand is sensitive to water, so for the best experience we recommend indoor climates where humidity levels are naturally lower than 60 percent. If the compound gets wet, let it air dry and it will return to the same great texture as before. This 100% safe, fun to shape, and easy to mold motion sand will offer hours of creative learning and fun.