National Geographic Hydrophobic Substances

  • FASCINATING WATER-REPELLENT SAND & GEL defy the laws of nature and don’t get wet when exposed to water!
  • ENDLESS CHEMISTRY FUN that will mystify kids over and over – not a one-time-use experiment!
  • LEARN THE SCIENCE BEHIND THE SUBSTANCE with the 16 page, full-color National Geographic Learning Guide.

US$19.97

On backorder

SKU: 61973 Category: