Crayon is a kind of colored wax brush used for painting and doodling, which is usually used on paper or other painting surfaces. They are made of wax and colored particles, providing a convenient way of painting, especially suitable for children.

I history and development of crayons:

As a painting tool, crayons can be traced back to the beginning of19th century. The earliest crayons were usually made of wax and colored powder, and were used to draw various patterns. With the passage of time, the production technology of crayons has been continuously improved, and the types of colors have gradually increased. Modern crayons are usually made of non-toxic materials to ensure safety, especially suitable for children.

Second, the use of crayons:

Crayons are widely used in painting, graffiti and painting. They are common painting tools in children's painting courses and preschool education, because they are easy to use and carry, and they also have rich color choices. Crayons can not only draw patterns on paper, but also be used to make colored handicrafts, such as colored wax paintings and batiks.

Third, the types of crayons:

Wax crayon: it is the most common kind of crayon, made of wax and colored particles, and has complete colors.

Water-soluble crayon: This kind of crayon can melt with water, creating the effect of watercolor painting.

Oil-colored crayons: This kind of crayons contains oil and is rich in shades, which is suitable for painting.

Gel crayon: This kind of crayon is like gel, which is smooth to use and suitable for detailed description.