The National Geographic Explorer Science Series Earth Science Kit is a must-have for any promising young scientist!Kids will love making their very own erupting volcano, experiencing the magic of chemistry as the eruption powder reacts with water. Looking for another eruption formula? There are multiple variations to try in the clear, easy-to-follow instructions.They will also be amazed as a potion of water and crystal-growing solution grows into a fully formed crystal! Our special crystal-growing formula means crystals can fully grow in as little as 3 days!No Earth science kit would be complete without activities centered on geology, which is why there is a pyrite dig brick in the kit. Additional rock and mineral specimens in the kit are the perfect start to a rock collection, and include snowflake obsidian, tiger's eye, green fluorite, pumice, desert rose, blue calcite, and a geode. For Ages: 8+WARNING: Choking Hazard; Small Parts. Not for children under 3 years old.