You asked a very important question.
Let me clear up a common misconception. The main purpose of participating in an internship (as well as shadowing, volunteer, and coop programs) is not to impress a college or an employer. The main purpose of such programs is to gain career exposure to help to make sure that one is making an appropriate major and career decision. The most frustrating times spend while doing college recruiting were the times when a graduate once on the job, found that he/she did not like the job for which he/she had studied as he/she had not done enough research and career exposure. Selecting a career/major is like buying a pair of shoes. They may look great, but you need to try them on and walk in them for a while to determine proper fit and comfort.
Let me know if and how this might be of help. Keep me posted. I would like to follow your progress.