If you have a car or you are on a tour to circle the major portion of the island, you will probably want to make a stop at the Dole Pineapple Plantation It’s just north of Wahiawa on Hwy 99 (Kamehameha Hwy). The plantation has a few different activities for the kids and they have a really nice tropical garden to stroll through. I didn’t take the time to ride the train out to where they process the pineapples, but I did get a ticket to view the gardens. Definitely worth the price of admission.
See all the images on my Flikr site: Dole Pineapple Collection