Christmas calendar: 24 kinds of rocks, gems, mineral specimens, 24 openings (may contain the same stones or stones not shown in the picture), each day has different surprises, forming a lasting attraction for children. The ultimate specimen collection: a perfect standalone collection or add to any Childs specimen collection, including 24 rough and polished ore samples. Become a great gift for boys and girls. Time concept: Geology is more exciting than breaking rocks and finding crystal treasures; calendars are also a great way to teach children counting, the concept of time, and the art of patience. Parents can also give their children special surprises on designated dates. The perfect gift: children and adults like this gift. Note: Not edible. Please do not put it in your mouth, it is not suitable for children under 3 years old. Material: Stone Size: 21*16.4cm Packing list: 1 set /24 pcsCategory: Corsage and Corsage Pins