Thames & Kosmos 643522 Crystal Growing Science Experiment Kit with Coloring Book

Brand: Thames & kosmos
  • 15 diverse expiriments for hours upon hours of scientific fun
  • Experiment with four chemically different crystals each with different properties, including potassium alum crystals that form regular octahedrons, rapidly growing sodium sulfate crystals, long needle-shaped sodium acetate crystals, and plaster which is made from gypsum crystals.
  • Mold fun plaster shapes, including stars, lightning bolts, dolphins, and pyramids, and grow layers of crystals on them.
  • Over one million units of this kit have sold worldwide!
  • 32-page, full-color and easy-to-use experiment manual
    • Price: $44.99
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