AWESOME! I think this manipulative would be great to use in a math center for kindergarten or first grade because it helps the students visualize addition problems by comparing the 2 numbers individually with different colors and together when they're connected to find the sum of the numbers. 5266
Natural geodes are hollow rock formations that contain deposits of crystals. Assuming you don't have a geological timeframe to obtain a geode, it's easy to make your own crystal geode using plaster of paris, alum, and food coloring.