National Geographic Break Open 10 Premium Geodes 芒聙聯 Includes Goggles, Detailed Learning Guide & 2 Display Stands - Great Stem Science Gift for Mineralogy & Geology Enthusiasts of Any Age

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DISCOVER CRYSTAL TREASURE when you break open these rocks to find amazing crystals inside!
COLORFUL VARIETY of hand-selected geodes for interesting, vibrant crystals
100% NATURAL GEODES may be as big as a tennis ball or as small as a ping-pong ball and are the perfect size for kids
16 PAGE FULL-COLOR LEARNING GUIDE describes how geodes are formed and details the variety found in nature
100% SATISFACTION GUARANTEED - For 129 years, National Geographic has provided fascinating and fun educational opportunities to aspiring scientists around the world