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Thames & Kosmos  |  SKU: HT-THK551101  |  Barcode: 814743014794

Thames & Kosmos Crystal Geode STEM Experiment Kit | Grow a Beautiful, Colorful Crystal Geode! | Explore Crystals, Rocks & Minerals| 3-Language Instruction Manual (English, French, Spanish)

Grow a beautiful, colorful crystal geode — a hollow rock with crystals inside it — by first molding a plaster shell and then filling it with a crystal-forming solution. Learn about geological crystal formations.

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$9.99

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