Ultimate Specimen Collection: Perfect independent collection or to add to any child's specimen collection, including 24 rough and polished ore samples. Be a great gift for boys and girls. Interesting Christmas Calendar: 24 rock specimens with 24 openings (may include the same stones or stones not shown in the photo), with different surprises every day, forming a lasting attraction for children. Details of the product: geology is more exciting than breaking rocks and finding crystal treasures; Calendars are also a great way to teach children about numbers, the concepts of time, and the art of patience. Special surprise: Increased interest of children, so that children can find little surprises every day. Parents can also add special surprises for their children on the date listed. Perfect Gift: Kids and adults love this gift. Note: inedible. Please do not put it in your mouth, children under 3 years old are not suitable. Quantity: 1 set Note: it does not include other things, the color is based on the first picture, and other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thank you!