Sweet Sixteen

My Sweet Sixteen is February and I`m trying to get some ideas. I know that its like 7 months away but I`m going to be going on a school trip to Spain in March a month later and I`m saving for that. So I`ve been trying to think of some ideas that wouldn’t be too expensive but I`m stuck and can`t think of anything that I like. What did you do for your party or do you have any ideas?