Rainbow crystal clay is an environment-protected and recyclable high-tech product. It owns many advantages, such as clean, non-poisonous and inodorous. Not only can it be used to cultivate indoor plants, but also it can be used for decoration because of its colourful characteristic. Once the crystal clay comes across the water, it absorb the water and multiply expand. After absorbing the water, it is shining and looking like the crystal. But, if you don't spray it for some time, it will refresh what it was at once. If you want to have this magical experience, please do it by yourself.