Thames & Kosmos Crystal Growing Kit
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Grow dazzling crystals and conduct 15 amazing experiments with a fantastically fun science kit that lets you grow four kinds of crystals, each with its own shape and properties. Mold plaster stars, lightning bolts, dolphins and pyramids, and then grow layers of crystals on them; mix dyes to grow a rainbow of custom-colored crystals; form your own geode and create a beautiful crystal cavern...