Discover the endless possibilities of these four sensory and motor modeling balls! Each ball has its own unique pattern (stars, lines, rings and circles) with which prints can be made in modeling clay or sand. The balls are made of colorful and soft rubber and consist of two halves that can be unscrewed and then put back together, even if they have different motifs. Taking the modeling balls apart and putting them back together trains fine motor skills. For an extra sensory experience, the balls can be filled with bubbles, balls, rice or sand. These balls are also perfect for stamping patterns in Knete, Mad mattr, Kinetic sand and Sand. In addition, they are completely washable, so they can be used again and again.