Fork and screen- if you don't have that type thing near you, renting mice, parasailing, boardwalk one night, splittsville, Disney quest, sci fi is always fun, cape may for crab legs, wagon ride at ft wilderness to watch the fireworks, going up at dusk in the balloon, La Nouba is a hit for my boys (16,18)...these are all things they like.
My DS18 has done the Richard Petty ride along 2x-1 stock , 1 exotic and got the photo and video, both done for birthdays and he's got those pics on the plaques on his wall. Always says he wants to go again!