a beautiful crystal geode, a hollow rock with crystals inside it, by first molding a plaster shell and then filling it with a crystal-forming solution. Please wait, change, share this deal.
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Includes the materials to make 1 experiment and an 8-page full color manual. Learn about geological crystal formations. Check out great deals on things to do from kids activities to nightlife ; try out new restaurants, spas, massages and hair salons near you, or plan a trip away from home. Groupon didn t get your email from Facebook, but we need it to sign you. If you d like to share it with us so you can take advantage of Facebook Login, you can update your Facebook permissions to give us access to your email.