What would make it special for our them? I have been many times but my friends live in Austrailia and haven't visited the world before. I'm trying to come up with some really nice ideas that won't involve taking the park by storm each day.
Are you going with them...how about some ADR's at some great restaurants? Make sure you include at least one with some characters. Depending on where you/they are staying, there are sometimes fun things at the resorts (for example, the horse drawn carriage rides at POR). Go over to the Boardwalk one evening.
downtown disney is always a good place to spend some time. I always take my friends who havent been to all of the hotels and show them what they look like. i works for my friends!
Definitely get a character breakfast or dinner at least once. Maybe consider getting the dining plan and eat a good meal each nite. Since they're so far away, this could be a once in a lifetime opportunity for them, so might as well go all the way!!