The National Geographic Fool’s Gold Mini Dig Kit provides an exciting chance for kids to discover a dazzling pyrite specimen inside a gold bar-shaped dig brick! Use the included dig tool and brush to excavate your specimen, then learn all about it in our full-color learning guide. The National Geographic Fool’s Gold Mini Dig Kit provides an exciting chance for kids to discover a dazzling pyrite specimen inside a gold bar-shaped dig brick! Use the included dig tool and brush to excavate your specimen, then learn all about it in our full-color learning guide. Every dig is a surprise! Gold bar-shaped dig brick contains a pyrite (fool’s gold) specimen.