National Geographic Jumbo Volcano Science Kit

Build the biggest volcano in the lineup - an 18-inch structure cast with included plaster wrap, powder, and cardboard frame, then painted and erupted up to six times with included eruption powder and crackling pop crystals. Includes two real volcanic rock specimens (geode and pumice) and a full-color learning guide on tectonic plates, earthquakes, and volcano formation. A go-to pick for science fair projects, grades 3-7.