Scientific observation: hone in on observation skills and patience as your child experiences The process of crystallization. Simple chemical reactions: combine simple household materials and watch as they react to cause an eruption. Manufacturered by Discovery. Excavate & educate: excavate and identify 11 precious gemstones then learn how real geologists use Streak plates to identify the true color of a stone. Age range: 12 years & up 3 hands-on activities: grow colorful sparkling crystals build and decorate an erupting volcano and excavate 11 precious gemstones.