National Geographic Rock Tumbler Refill Kit - 1 Lb. Jasper Rocks for Tumbling - 8 Varieties Including Mookaite and Kabamba - Rock Tumbler Supplies Include Rock Tumbler Grit and Jewelry Accessories

National Geographic Rock + Mineral Card Games

National Geographic Crystal Growing Kit for Kids - Educational Science Kits for Kids Age 8 with Green Glow in The Dark Crystals and Authentic Geode | STEM Gifts for 8 Year Old Boys and Girls

Blue Marble National Geographic Crystal Reef Science & Nature for Ages 8 to 12