Hydrophobic Sand Stays Dry

Sand looks dry even after being underwater. Ask students to predict what will happen. Pour sand into water, then remove a clump/spoonful. Key idea: A water-repellent coating prevents water from wetting the grains. Ask: How can something be underwater but not wet? Safety and cleanup: Purchased non-toxic demo sand; no ingestion. https://www.google.com/search?q=%22Hydrophobic+Sand+Stays+Dry%22+science+demonstration+experiment