Children are many times more sensitive to color than we adults. What they need is to understand and feel the color differences of trees, flowers, blue sky and white clouds in the natural environment. Early education is to let children learn knowledge from observing the details of life to experiencing feelings, rather than instilling artificial book concepts. Books such as chromatography are only needed when older children learn gouache and watercolor painting. If your child is over 6 years old and ready to learn watercolor painting, then you can consider choosing basic teaching materials related to art.