National Geographic Hydrophobic SubstancesExplore the power of hydrophobia with smooth sand and cool gel that dont get wet when exposed to water! This awesome lab kit includes all chemicals, containers, instructions and accessories that young scientists need to create Chemistry Magic. Check out the fascinating full color Learning Guide to discover concepts like hydrophobia, viscosity, polarity and more! Features: Defy the laws of nature and dont get wet when exposed to water! Learn the