There is no shortage of fun things to do in Charleston, SC. If you come to Charleston you have to get on the water somehow. Go kayaking or take a Charleston harbor cruise. Nearby beaches offer good surfing and wide stretches of sand for catching rays.
Play golf. There are several highly-rated golf courses in and around Charleston.
Go shopping. Explore the unique shops downtown. The King Street corridor is known for antiques, apparel and a variety of other merhandise.
Enjoy this 11 minute video introduction to Charleston.