Sweet 16 Ideas?

I'm trying to convince my parents to have a party for me since I'm turning 16 at the end of September. However, my parents don't have too much money and there's a budget I have to follow. I know that a BBQ would be a fun party at my house, but I've kinda been doing that for the past couple of years for my birthday, and it's now really boring. My parents would never allow me to have a sleepover. I just really need some help getting some ideas of what I can do for my 16th birthday. Please someone help me.

By C. L.