H.S.
When you go to Sea World, the current ticket deal is buy one day get the rest of the calendar year for free. You can also buy tickets online. I would suggest that you upgrade one ticket to the annual pass. I think it's all of a $20 difference and with it you get free parking ($15) (unless you upgrade to the "better" parking), 10% off food and stuff, a souvenir cup (that costs $8 if you buy it regular, and you can get 99 cent refills all day with it). When we took our two kids that's what we did, and it totally paid for itself in one day, although we went two.
I figure with today's prices, anyway to save a couple of bucks is helpful.
Have fun!!!