"I think you can make an extremely talented child because it takes many, many hours of practice to make a child good at anything," she said.
Quart added that having a child who is exceptionally talented in one skill, doesn't mean parents should expect the child to be a prodigy at everything, and that there was a heavy pressure on today's kids to be well-rounded.
"Being particularly good at one thing can actually produce a sense of value," she said. "But it's important not to overly praise it."
The key to maintaining a gifted child's happiness, Quart said, was for parents to make sure their child continued to enjoy the work.
"It doesn't have this kind of robotic, studious thing and have this sense that you're just performing," she said.
Keiron's parents said that raising a child prodigy wasn't easy because they were constantly concerned about their son's well-being in the public spotlight.
"You worry about being good parents anyway," Michelle Williamson said. "But when you're given such a responsibility you want to make sure that, you know, he's well protected, that he's well balanced."
She added that she also feared Keiron would get burned out.
"It's completely Kieron's choice whether he paints or not," his mother said. "We hope for his sake that he doesn't lose it completely but if he decided that he didn't want to sell his work commercially then I think [my husband] and I would be quite pleased that we wouldn't have that headache anymore because it's a massive responsibility."
As for 8-year-old Kieron, he seemed content with being a painting child prodigy, saying he already knew what he wanted to be when he grew up.
"A really good artist and a professional footballer," he said.