Watch with amazement as crystals grow before your very eyes! The Smithsonian Crystal Growing kit lets you grow three different crystal clusters – golden citrine, aquamarine blue and emerald green. Begin observing crystallization within just a few hours of finishing the chemistry portion of your experiment. Then watch them continue to grow over the course of several days. Included STEM content poster teaches about crystalline habitats and structures, crystal sizes and shapes, crystal systems, the importance of crystals and more. Ages 10+. Adult supervision required.