Unique Hairband

So, I usually put my hair up in a high tidy bun, or pony tail. But looking for something different for the last day of school. Thing is, I never thought of buying any accesories, I never thought I needed them and I'm quite a -buy what you need only- person. But now I do, but it's a bit late, so I'll use what I have.

Do you have any ideas?

I have long layered hair, and it's side parted which I won't change. It's straight aswell.

I can use my straightener and curler if I have to.

Please include steps, and a picture. Or if you saw a good video on youtube about a hairstyle then giive me the link, please.

Thank you, I appreciate all the help.

Oh, by the way, I'm 14 so I want something quite fun, but nothing childish.