STUNNING SPECIMENS FROM AROUND THE WORLD - The polished rocks, gems, and fossils in this advent calendar include Geode; Pyrite; Rose Quartz; Red, Black, and Green-Spotted Jasper; Agate; Tiger's Eye; Brachiopod; Black Urchin & more! 24 DAYS OF TREASURES - Each day leading up to Christmas, kids open a panel to reveal a special rock, mineral, fossil or gemstone! With this Christmas countdown calendar, they can start a rock collection they will enjoy all year round, with storage bag included! DIG OUT A SPECIAL CRYSTAL ON THE FINAL DAY - The final piece in this collection is a stunning Rose Quartz specimen that kids will unearth from a mini dig brick. Dig tool and brush included, with a magnifying glass for looking at all the pieces up close! A HOLIDAY GIFT THAT LASTS A LIFETIME - Rock and mineral collecting is a popular hobby, and this rock collection kit is the perfect way to inspire a lasting love of geology for kids, and teach them about the fossils, rocks and crystals inside! HIGH-QUALITY EDUCATIONAL TOYS - National Geographic is proud to make the highest quality hands-on science toys, and all are backed by exceptional service and a commitment to your satisfaction.