I have a few suggestions for shows they hopefully have not done:
- Ride Que areas?
- Extra paid tours( i.e. Behind the Seeds, keys to the Kingdom)
- Restaurants for 1st timers
- Things you must do each time you visit
- Favorite areas of the park (i.e. the light up pavement at Epcot, Spacheship Earth at night
- Souvenirs to get for each trip