OT: Adventure Island - Is it suitable for 4 and 6 years old

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I have bought the Super Grover Passports for my family, and we can visit all Anheuser Busch Parks this year. During our visit to FL next week, I plan to include Adventure Island, however, I am not sure whether it is suitable for DD4 and DD6. DD4 does not like roller coaster. I know they will like seaworld.

I have tried the following already.

http://www.4adventure.com/adventure_island/fla/default.aspx

Can someone share their experiences?

thanks
felicia