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National Geographic?s Calcite Crystal Growing Kit brings you an unparalleled crystal growing experience. With our full-color learning guide packed with fascinating crystal facts and a real calcite specimen included, you get the most comprehensive crystal kit on the market! This science kit includes: Crystal Growing powder, seed rock, stir stick, real calcite crystal, National Geographic?s learning guide, and instructions. This is the perfect project for kids of all ages and serves as a great introduction to geology and chemistry. This kit from National Geographic will spark a love of science in your child that will last a lifetime.