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, including stars, lightning bolts, dolphins, and pyramids, and grow layers of crystals on them. Use dyes to form colored crystals, and mix the dyes to grow a rainbow of custom colored crystals. Display your crystal creations in a clear treasure chest with a locking lid. Mold your own geode — a hollow rock with crystals growing inside — and create a beautiful crystal cavern inside. Experiment with growing crystals rapidly and slowly, and observe how that affects the crystal structures. See if you can grow one giant crystal, and many small crystals on the surface of a rock. Measure how the crystallization of solids out of a solution, and the dissolution of crystals back into solution, affect the temperature of the solution. Details: 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 25 pieces 15 experiments 32-page full-color manual For ages 10 and up Contents: 5 dye tablets 3 wooden spatulas 3 measuring cups with lids (30 mL) Geode mold and basin Mold for plaster shapes Plaster (calcium sulfate) Potassium aluminum sulfate (50 g packet) Potassium aluminum sulfate (four 20 g packets) Sodium acetate Sodium sulfate Lid remover Pipette Measuring cup with lid (200 mL) Treasure chest For some experiments, you will also need: distilled water (about 1 L), adhesive labels, pencil, transparent tape, thermomotor, paper towels, pot holders, old cooking pot, electric hot plate or stove, some empty jelly or honey jars with lids, yarn or nylon string, scissors, old newspapers, empty yogurt containers, all-purpose glue, small pebbles, sandpaper, cloth handkerchief, knife, rubber band (not included)