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snowflake obsidian
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Available in four earthy tones
NATIONAL GEOGRAPHIC Science Advent Calendar 2023 geology snowflake obsidian24 DAYS OF SCIENCE Each day of December as Christmas approaches, kids will open an exciting science experiment to conduct from our world class science kits, or a gemstone or fossil to add to their collection! CONDUCT 13 FUN EXPERIMENTS We selected 13 incredible experiments from our science kits for this advent calendar. Kids will love hiding revealing a secret message, making a test tube glow, floating coins, growing a colorful crystal tree & much
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