Bonaire is pretty laid back. Diving is about the only thing to do there. I am pretty sure you can rent scooters and if your into wind surfing, This is Definitely the place. The entire southwest of the island past the salt plant has a constant breeze. Be sure to watch out for the cruise ships! when their in town all the little shops and street vendors open up. Otherwise their closed. Most of the diving is accessible from shore, just look for the yellow painted rocks along the main highway.
Jeff