Geology doesn’t get more exciting then breaking open rocks and finding crystal treasures! Geodes can form with a variety of crystals inside and National Geographic strives to bring you the best variety available. This earth science kit provides a hands-on science experiment that you and your children are guaranteed to love! This is a perfect activity for energetic boys and girls! The included display stands are perfect for showcasing the crystals you find and starting a rock collection, while the Learning Guide will teach you many amazing facts about geodes! Player Information Age of Players: 8 to 99 YearsNumber of Players: 1 to 99Skill Level: BeginnerTime to Learn in Mins: 5Time to Play in Mins: 60 Small Piece Choking Hazard: No Battery Details:Batteries Included: Not RequiredBattery Details: 0 NAAdditional Batteries: 0 NAAdditional Information:Publisher: National Geographic Blue Marble Item ID: 816448020063 Packaging Dimensions: 10" X 7.25" x 2.5" Language: Bilingual (English/French) Country of Origin: CN