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Create non-toxic science projects that grow with these crystal growing kits. Each of these kits include thick paper shapes that piece together, forming a bare recognizable structure for your crystal garden to thrive in. The grown crystals complete the image of the paper shapes, whether it's an exploding volcano, leaves on a Giant Sequoia, or colorful coral on reef stems. Each kit includes one or more plastic petri dish bases, paper shapes, crystal mixture, and illustrated instructions. These simple projects are so fun, mesmerizing, and educational—creating a wonderful activity for students and families alike. Completed structures are approximately 3 – 6 inches tall, depending on if the project includes only one, tall structure or several shorter ones. The average completion time is approximately 3 hours, depending on temperature and humidity. ~ Brianna