National Geographic’s Light Up Crystal Growing Kit is the perfect project for kids of all ages and serves as a great introduction to geology and chemistry. This kit will spark a love of science in your child that will last a lifetime. National Geographic’s Light Up Crystal Growing Kit allows you to grow three crystals in 3-4 days on a base that lights up! A clear seed rock on the bottom makes it easy to see all the colours shine through and our full-colour Learning Guide is packed with interesting facts about crystal science and formation.