These are Crystal Water Gel Beads ( Multi-color ) Used For Bamboo Plants,Kids Tactile Toys - SensoryToys, Orbeez refill, Vase Filler, Soil, Plant decoration. Size: before: 1.5-2mm , after absorb water: about 10mm, Material :Superabsorbent materials, Color :Multicolor, Material: Non-toxic. How to use: 1. Soak the Crystal soil in water by the percentage of 1:200 for 4 hours.(don't use hot water ) Pour it out and filter away excess water. Crystal soil will absorb water and expand from 1mm diameter to 10mm (approximate) diameter ball shape. Ideal for indoor home/ office desktop plants. Also the best decoration for vase, soil, gardening and artificial plants.Provide oxygen & nutrition, helping plants to grow. A kind of water absorbent polymers that can be used for indoor plants growing.Keep out of direct sunlight. Color:multi-colors Quantity= 100 grams ( almost 5000 Particles).