Features: FunActivities: Accompany your family or friends to experience the process of making crystal from scratch,help them understand the principle of crystal growth and let them love science. STEAM: Let you understand the world from a different angle,to witness the crystal growth process and develop observation skills. Interesting Experiment: Each colorful crystal is unique and will reach full size in 7 to 10 days by following the detailed instructions,you can learn about the structure and geometry of crystals in this process. Crystal Growing Kit: Complete materials and instructions for each experiment are included with the kit.Perfect for young science enthusiasts,especially those with an interest in geology. Luminous Crystal: After the crystal is grown,you can irradiate it with a UV pen for a few minutes,and the crystal will emit a green light in the dark. Specifications: Color: Purple/Blue Package Size: 26 * 21 * 6.5cm/10.2 * 8.3 * 2.6in Package Weight: 400g/14.1oz Note: 1.Including some small parts.Not for children under 3 years. 2.This set is recommended for ages 7 and up with proper protective gear and constant adult supervision. Package List: 2 * Crystal Seeds 2 * Stirring Stick 2 * Mixing Container 2 * Crystal Growing Powder 1 * UV Pen 2 * Growth Container 1 * User Manual