Chrissy,
Whatever you decide to do, you'll have lots of fun!!! If you get the chance to go to Mooloolaba, visit Under Water World! the kids will love it. it's lots of fun.
- the website is fun!!!! google underwater world and it will come up (wasnt sure if i am allowed to put website on this as its an URL?)
and the restaurants along the beach there are excellent like one of the girls said, they are really nice and it's a good stroll along the beach with lots of shops, cafes etc
have fun!