The water baby is a transparent ball like a bead, about the size of a rubber pill. Its colors are mainly red, yellow, blue, green, purple, orange, black, colorless and cyan, which is very eye-catching. Packed in small plastic bags or small glass bottles, each bottle is about 15~30 balls, and the price is 0.5~ 1.0 yuan. They also have an interesting name "water baby", because it will change "magically" when put into water.

Water Baby, also called water sprite, is a colored bead the size of a rubber pill. After being soaked in water, it can quickly become a big bead and even give birth to a small "bead". Such "magical" things naturally attract many children, so many primary school students are popular with "water babies".

What is the true face of "water baby"? Is it harmful to human body? A teacher from the Department of Chemistry of Northwest University analyzed that it should be a kind of water-absorbent resin, which is usually made of starch mixed with acrylonitrile or acrylate. Both acrylonitrile and acrylate have certain toxicity. Moreover, it is impossible for merchants to use expensive food pigments in their production, and some industrial pigments may be added. Therefore, primary school students are advised not to play with such things. If it comes into contact with skin, it should be cleaned quickly. Of course, parents should also pay great attention to avoid letting children play to avoid eating by mistake.