The National Geographic Explorer Science Series Sensory Science Kit A one-stop science pack with awesome slimes, putty, and play sand! You get 1lb of natural play sand, 6 sand molds and a convenient play tray. This kinetic sensory sand won't dry out so there’s no end to the amount of imaginative fun you can have. Hydrophobic sand comes in the kit too, and it’s an incredible sand to conduct experiments with since it never gets wet! Our snotty slime and liquid slime come pre-made, ready to play with right out of the box. The textural differences between the two are astounding! You’ll also receive color-changing putty, which is specially formulated to change colors when warmed or cooled. Our easy-to-follow instructions also include several slime recipes you can make at home with common household items. The Sensory Science Kit is great for families that like to play together, and the detailed learning guide provides insight into the science at work in the kit. National Geographic Toys makes the highest quality hands-on science toys, and all products are backed by exceptional service. About the National Geographic Society: With a mission to inspire people to care about the planet, the National Geographic Society is one of the world's largest nonprofit scientific and educational organizations.