When John Richardson was teaching 4-year-olds how to kick a soccer ball during a preschool class, it may not have been immediately obvious that this was a career opportunity. However, the recommendations from parents after that initial class snowballed across the Minneapolis area and Richardson soon found himself coaching more sessions and introducing kids to more types of sports. Today, Revolutionary Sports has grown into a team of 50 coaches who lead classes and camps for an array of ages and ability levels. Among its many duties, the staff teaches youngsters how to shoot a basketball, hit a baseball, spike a volleyball, and weave football flags into umbrellas.