Make your own volcano and watch as it erupts with bubbling, fizzing "lava." Geology rocks when you can dig, excavate, study and display your own crystals and minerals. Geology rocks when you can cast, paint and erupt your very own volcano. Kit includes fast drying plaster, volcano shaped mold, paint, brush and stir stick. Finished volcano stands about 4" tall and can be erupted again and again. You will need rubber bands, baking soda and vinegar. Geology rocks when you can make your own 4-Inch tall erupting volcano Kit includes fast drying plaster, volcano mold, paint, paint brush and stir stick Requires baking soda and vinegar for eruption (not included) Detailed instructions included