Learn about growing and cultivating your very own crystals. The kit contains everything children need to grow different colours and types of crystal. The detailed instruction booklet contains fascinating experiments and explains how the crystals were formed when the Earth cooled millions of years ago. 14 experiments. Detailed instruction booklet. Educational, safe and fun. Size H36.4, W7.7cm. For ages 10 years and over. WARNING(S): Not suitable for children under 3 years old. Only for domestic use. To be used under the direct supervision of an adult.