As the summer heats up, you'll inevitably see plenty of neighborhood kids hawking their wares -- a 25-cent cup of lemonade.But that's not the only small business young ones are getting into. Kids are discovering options with low start-up costs, and are quickly becoming the next wave of entrepreneurs. The book Better Than a Lemonade Stand: Small Business Ideas for Kids was even written by one: 15-year-old Daryl Bernstein. Running their own business can teach children important financial management and planning skills. And even if your kids don't seem to have the entrepreneurial spirit, there are plenty of ways to help them get started.