Allergen, dust, and gluten-free, antimicrobial Kinetic Sand does not stain, never dries out, and cleans up easily. Designed to support cognitive, fine motor, and sensory development. Store in a sealed container. If Kinetic Sand gets wet, air dry to restore original texture. Natural weighs 5 1/2 pounds. Colored Kinetic Sand also available in 5-pound boxes containing two colors: red/purple and green/blue. Mini Castle Molds and Laptop Tray also available.