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Crystal Growing Colour Changing Light Up Kit | Hands-On STEAM Science tiwi islands medical professionalsGrow real crystals then watch them glow. The 4M Crystal Growing Colour Changing Light Up Display is a hands on STEAM science kit that lets children aged 10 and over grow their own crystals at home then showcase them in a colour changing LED display. Screen free, experiment based science this kit teaches real geology and chemistry through active learning. Mix the solution, watch crystals form over about a week then place them on the glowing rainbow