The National Geographic Explorer Science Series Earth Science Kit is an unforgettable hands-on experience with the sciences of Earth! Your Elementary School or Middle School child will love making their very own erupting volcano growing a crystal digging pyrite out of a dig brick and creating a mesmerizing water vortex. You also get a handy storage case for all the included rock and mineral specimens: snowflake obsidian tiger s eye green fluorite pumice desert rose blue calcite geode and agate. It s a great start to any rock collection! National Geographic Toys makes the highest quality hands-on science toys and all products are backed by exceptional service. STEM toys are Science Technology Engineering and Math based products that are geared towards developing useful skills in all areas of learning. This product focuses on the core subject: Science. Assembled Product Weight: 2.38 lb.