They are staying at the Occidental through at timeshare trade from one of the parents. I am not sure if they will have a mandatory all inclusive or not. I am definitely going to encourage dining out a few times so gift certificates are a great idea too!
Divi links, pool, beach, lighthouse, Arikok National Park, etc.
I second the towel clips or the "towel traps" which are small pillows with an elastic band around them which not only keep the towel in place but gives you a compfy place to rest your head while soaking up the beautiful Aruban sun. A must have for us while in Aruba with the tradewinds!!!!