8-year-old painting prodigy is new art world star By JILL LAWLESS, Associated Press Writer Jill Lawless, Associated Press Writer Fri Aug 13, 8:54 am ET HOLT, England – He's Britain's most talked-about young artist. His paintings fetch hefty sums and there's a long waiting list for his eagerly anticipated new works. It has all happened so quickly — he's still getting used to the spotlight — and Kieron Williamson fidgets a little when he's asked to share his thoughts on art. "Cows are the easiest thing to paint," said Kieron, who has just turned 8. "You don't have to worry about doing so much detail." Horses, he says, are "a lot harder. You have to get their legs right, and you have to make their back legs much bigger than their front.&q