It's a real 'mystery' as students won't know what's buried inside until they 1) excavate it; 2) perform tests on the specimens; and 3) consult the guide to help determine what the various specimens are Students learn actual methods used by real archaeologists and paleontologists as they excavate 10 buried treasures hidden within the clay rock, then complete activities to learn even more Kit includes Mystery Rock with 3 authentic fossils, 4 genuine gemstones, 3 rock specimens, a Prospector's Log Book, excavation tool and brush, specimen identification chart, and display tray.