When most people think of interns, they imagine young college students. However, a growing number of interns are older, with years of work experience behind them. Peter Stephens, managing director of the Washington Center for Internships and Academic Seminars, estimates that 8 percent of his 450 to 550 interns each summer are older than 30. These interns are looking for ways to explore their opportunities and possibly switch careers. Although some find it hard to balance the responsibilities of adult life and internship duties, many older interns report that their younger coworkers are very accepting of them.