I have to take my kids on a roller slide which has a bunch of little rollers that even adults can enjoy. They look dangerous but irresistibly fun. It's funny to me that they are just there (and free) in public parks throughout the island.There are youtube videos of huge roller slides in Okinawa in public parks.
http://okinawahai.com/2007/12/tobaru-koen-par.html
http://www.mapitokinawa.com/2011/07/big-awase-slide.html
