Well let's see first off, Wild Thornberry's is the perfect water ride that doesn't get yo absolutely soaked but just enough to cool you off. Also, Kings Island gives out free cups of water as well, which I strongly suggest you take advantage of because Pepsi and other carbonated beverages will dehydrate you very quickly. Take advantage of the shows in the Festhaus and Kings Island Thatre, the are really enjoyable and cool. Flight of Fear and SDATHC are the main air conditioned queue lines in the park but some others offer shade such as, The Racer, The Beast, Drop Tower, Invertigo, Delirium (For the most part), and WWC considering it is in through the woods; but the ride will leave you drenched, a little bit of FYI. Make sure you also check out the Coca-Cola Mist Zone over by Adventure Express in Oktoberfest.