National Geographic Instant Snow - LargeYou have to see National Geographics Instant Snow to believe it! This incredible powder instantly expands when you add water, turning into a soft, fluffy substance that looks and feels just like real snow! The full color Learning Guide has loads of facts about super absorbent materials, providing lots of information about the science behind the snow. Plus, theres also a Cloud Slime recipe included that incorporates Instant Snow in a sticky, gooey and