Finding an agent is tough. For kids looking to get into commercial acting, one top talent agency executive and a former child star dish on what it takes to standout.For commercials, it’s all about the interview process and how well a child can sell the product. Having strong reading and speaking abilities doesn't hurt either. "Natural expressions and personality are the keys to success in commercials at all ages," says Natasha Matallana, president of Take 3 Talent Agency, Inc., which represents children, teens and adults for television, films, commercials and theater in New York. "The best commercial kids are those that other kids feel are approachable and/or aspirational," she says. According to Christopher M. Allport of Allport Productions in Toluca Lake, Calif., it's essential for a child looking for a commercial career to have an agent. "You probably can't get commercial auditions without getting a legitimate kids commercial agent,...