Grow dozens of dazzling crystals and conduct 15 illuminating experiments with this classic science kit. 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 and mix the dyes to grow a rainbow of custom colored crystals. Measure how the crystallization of solids out of a solution, and the dissolution of crystals back into solution, affect the temperature of the solution. Learn about the energy of crystallization. Investigate solutions, crystallization, and the chemistry of crystal growing. Learn about the structures and geometries of different crystal shapes. This kit is thoroughly tested and safe: Over one million units of this kit have sold worldwide. A full-color, 32-page experiment manual guides your experiments in crystal chemistry and Earth science. Launch date: Summer 2012.
— Mary Porter Green, owner of Curiosity Zone in Ashburn, Va., told TDmonthly in a Fall 2012 survey that kits from Thames & Kosmos are one of their top-2 bestselling educational products. They sell dozens each month.
— Mary Porter Green, owner of Curiosity Zone in Ashburn, Va., told TDmonthly in a March 2014 survey that crystal growing kits were a best-selling products.