National Geographic Crystal Growing Science Kit contains all you will need to grow at least 12 types of crystal. It explains how crystals were formed when the gases the Earth cooled millions of years ago. You will not only learn but also discover everything you need to know about Crystal Growing.
National Geographic Mineral Dig for children contains all they will need to carefully excavate 13 specimens of either mineral or rock using the tools provided from the plaster block and display them on the stand included.
