Although children can learn some skills and knowledge in art training classes, I don't recommend that children only rely on training institutions to learn painting, mainly for the following reasons:

1. High cost: The tuition fees of art training institutions are relatively high, which some ordinary families can't afford, and children's artistic literacy does not depend entirely on the training institutions.

2. Rigid teaching mode: Some art training institutions will adopt a fixed teaching mode, which may limit the development of children's creativity and imagination, and may even make children lose interest in art.

3. Lack of opportunities for independent exploration: Art is a creative activity, and children need opportunities for independent exploration to explore their own ideas and inspirations. In training institutions, children may not get enough freedom and space.

4. Premature sense of competition: In some art training institutions, there is premature sense of competition, and children may be troubled by excessive competition and performance pressure, which is not conducive to the development of children's physical and mental health and artistic accomplishment.

Therefore, I think parents should encourage their children to create freely in their daily lives, provide diversified artistic materials and resources, guide their children to cultivate their artistic interests and abilities, and let them grow naturally in happiness. If children have a strong interest and demand in learning painting, they can also find some local painting clubs or studios to study. The cost of these institutions is relatively low, and they can also provide more opportunities for children to explore and create freely.