How should I do my hair?!?

I'm going to 6 flags on Friday, and there will be some kids from school there. I have a really cute outfit. But idk what to do with my hair! We'll only be going in the evening until closing. I have shoulder length, layered hair.. Last time I went I straitened it, and it got kinda messed up. I was thinking of curling it. But idk! I wanna look pretty! Help please! :)