This kind of water-swellable particle may be a kind of water-absorbent resin, which will be separated when it swells in water to a certain extent. Water-absorbent resin is generally made of starch mixed with acrylonitrile or acrylate, which has certain toxicity. Bright colors are caused by adding industrial pigments, which are harmful to human body. As parents, we should be careful not to let children play to avoid eating by mistake. Water droplets introduction

Ocean water drop, also known as growing bean, is a kind of colored crystal ball, which is similar in shape to glass beads and has many colors such as red, yellow and black. It can grow rapidly when put into water, and its body is very soft, and it feels like candy when held in your hand. At first, it was only as big as mung beans, or even smaller, but it grew quickly, and some of them could "give birth" and grow one adzuki bean after another. A small hole appeared in the bean that grew before birth, and the child was born from the small hole. This is because the seeds of growing beans are rich in nutrients and can support their growth and "development". Some growing beans are round from small to large, while others are all kinds of beautiful figures, such as five-pointed stars and triangles. Put a seven-color crystal ball in a bottle, add some water or air freshener, and it will grow slowly within 1 hour, and the fragrance inside will last forever. Many jelly-like things on the market are used for decoration, plant cultivation and drying, and also for the inner core of feminine hygiene products, which is due to its super water absorption. The appearance and function of water droplets.