Sandtastik Therapy Play SandClean, coarse Therapy Play Sand in natural white color for indoor sand tray therapy professionals, play therapy trays, sensory activity tables and in home or office applications. Sand, the boundless medium kids love getting their hands on! Watch as kids create a world full of wonder and meaning with play therapy toys while developing fine motor skills, intellect, visualization and social conduct. Sandtastik Therapy Play Sand is tested and certified by