Do you think it's a good idea to teach art for kids? i love painting, so why not to shear my experience?

Of course it is. Kids love to be creative. They are less self concious and can really get into what they're doing. My daughter took painting lessons from about age 6 to age 9 or 10. She enjoyed it and her dexterity improved. Her art teacher at school kept commenting on how talented she was. I finally told her she was getting lessons on the weekend. I think it's great because if a child is really going to be interested in it for life then an early start just means so many more years for them to enjoy their hobby. Who knows, some of those kids could become professional artists when they are older. But even if they don't, it's something they will enjoy while they're young and may be something they'll enjoy for life.