15th Birthday Ideas?

I'm turning 15 on the 15th of May. I'm usually very prepared for my birthdays, like months before, but this yearI'totally clueless. I want to go out with my friends, somewhere fun. I want to be around my family as little as possible. I'm not a super girly girl, I'm not a tomboy either. I wanted to do a scavenger hunt, but my friend is doing that for her birthday and I don't want to take it from her. It can't be too expensive. Thanks :)

By Bre K. from Sydney, Australia