Crystal soil, also known as water beads or gel beads, is a type of hydrogel made from polymers. The beads can absorb large amounts of water and swell to many times their original size. They are often used as a decorative element in vases and bowls, or as a plant substrate.
Crystal soil is non-toxic and safe for both humans and animals. The beads are available in a variety of colors, including clear, white, blue, green, pink, and purple.