Features: Interesting Scientific Experiment: Package with materials for scientific experiment, follow the instructions to finish the DIY crystal decoration,which encourage and enhance children's senses, exercise and stimulate their basic hand & eyes abilities, familiar the chemical knowledge as well. Wide Range Application: 3 color options to choose, which is awesome for teenager science enthusiasts, teaching props, scientific educational purpose, or just for DIY crafts of your own home ornaments. Easy Operation: Well equipped with experimental detailed instructions, easy to follow it but need to take couple of days growing the crystal, stimulate children's desire to explore, the concept of teaching in fun to evoke kids’ concentration & patience. Educational Training: With good educational training for kids,cultivate their abilities of observation, improve their interesting to chemistry class and further brain development. Best choice for Kids: Suitable for kids as birthday gifts, Christmas gifts, and encourage them free to explore their small world and create their DIY table decoration . Specifications: Packing Size: approx. 10 x 8.3 x 8.3 for cm/3.94 x 3.27 x 3.27 inch Material: PVC Color: Gold Yellow/Purple/Blue for Sky Net Weight: 224g/0.49 lbs Package Includes: 1Set Growing Crystal Toy note: Please allow 1-2cm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item.