This ultimate 24-piece advent calendar includes a full set of authentic geology tools — a rock hammer, flat chisel, brush, magnifying glass, and polishing cloth — plus 21 crystal geodes of various colors and shapes to uncover, making every single day an exciting treasure hunt. 24 DAYS GEM COUNTDOWN SURPRISES: Count down to Christmas with a sparkling excavation experience! REAL MINING EXPERIENCE FOR YOUNG GEOLOGISTS: Each compartment reveals a mystery crystal geode waiting to be cracked open and discovered!