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or a "sandwich" of matching elements--for example
4M - Crystal Growing Kit Space Gem Red Eye Color-Brown or a "sandwich" of matchingGrow amazing space crystals! Display them for everyone to see in the unique space capsule display and build your own crystal collection. The size, shape and colour of your crystal may vary depending on the experimental conditions. The Crystal Growing stimulates creativity with and improves learning of science principles. It is a great learning resource to stimulate mental development, creativity and encourage children's natural curiosity. It's a fun,
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