Marc Molk (b1972) is a painter and a writer. Although he did not paint many children, he painted a few. I’m afraid I can no longer locate this image on the internet so I have almost no specifics about it.
The artist has an official website but be patient; the images he uploaded are very high resolution and take a while to load onto the screen. There is a nice article on the artist’s work by Boum!Bang!.