Children's bubble machine toys, including Hand-Held Bubble Wand, automatic bubble guns, etc., are one of the more popular toys for children. Foaming water is mainly composed of water, surfactant, synergist, foam lasting agent, and preservative.   However, at present, my country has not yet formulated national standards, industry standards, or safety technical specifications for bubble...

In the twelfth century, people added eggs to Easter festivals, and the eggs were mostly painted red, but also painted in colors. Therefore, it is generally called "Easter eggs", also known as Easter eggs. The original symbolism of the egg is spring - the beginning of new life, and in Christianity, it is used to symbolize "Jesus rose from the stone tomb".The use of eggs to symbolize the...