The National Geographic Explorer Science Series Sensory Science Kit is a one-stop science pack with awesome slimes, putty, and play sand! You get one pound of natural play sand, 6 sand molds and a convenient play tray. It won't dry out, meaning theres no end to the amount of imaginative fun you can have. Hydrophobic sand comes in the kit too, and its an incredible sand to conduct experiments with since it never gets wet! Our snotty slime and liquid slime come pre-made, so are ready to play right out of the box. The textural differences between the two are astounding! Youll also receive colour-changing putty, which is specially formulated to change colours 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.